Conceptually you now know how a forward search operates. You have an article "in-hand" (cited article) and you want to find all more recent (than the cited article) articles (citing articles) that have referenced that "in-hand" article. This can be a bit confusing, so make sure you read the next section carefully.
The first key element in your search is the bibliographic information for the "in-hand" article. You will be using search terms that are the bibliographic information (author, publication year, page numbers, etc., but NOT words that appeared in the title or abstract) of the "in hand" article (the cited article). The L-numbered sets that result are articles (citing articles) that have footnoted your "in hand" article.
The fields for this part of the search are:
Cited Reference Author /RAU
Cited Reference Count /REC
Cited Reference Inventor /RIN
Cited Reference Page Number /RPG
Cited Reference Patent Number /RPN (or /PATS)
Cited Reference Publication Volume /RVL
Cited Reference Publication Year /RPY
Cited Reference Work /RWK
Note that they all begin with an "R". While it would be really nice if the /an field were the CAS accession number, such is NOT the case. The /an field is the ISI accession number, not the same as the CAS accession number! So you have to go about finding the "in-hand" article in the same way that you would find its CAS bibliographic record in file ca or file lca. A sample search command for the reference (cited, ie "in-hand") article would be:
=> s jentsch j?/RAU(S)1985/RPY
The above command was designed to look for articles that reference/cite a work published by Joachim Jentsch (/RAU) in 1985 (/RPY). The (S) proximity operator is critical in order to assure that the 1985 is in the same cited reference as jentsch. If omitted (i.e. essentailly replaced by AND), hits would be retrieved if they cited a Jentsch publication from any year AND if they cited a publication by any author in 1985!
The "?" is the standard "anything else" wildcard. It is used here to look for J. Jentsch's with any middle initials.
IMPORTANT: To clarify one point, in SCIsearch, referenced authors names only appear with initials. A couple simple expands in the RAU field of SCIsearch will show that:
=> e jentsch j/rau
E1 3 JENTSCH H/RAU
E2 6 JENTSCH H J/RAU
E3 84 --> JENTSCH J/RAU
E4 47 JENTSCH J D/RAU
E5 2 JENTSCH J T/RAU
E6 11 JENTSCH K/RAU
E7 66 JENTSCH K D/RAU
E8 1 JENTSCH K L/RAU
E9 26 JENTSCH L/RAU
E10 18 JENTSCH M/RAU
E11 3 JENTSCH N/RAU
E12 5 JENTSCH O/RAU
=> e jentsch jo/rau
E1 47 JENTSCH J D/RAU
E2 2 JENTSCH J T/RAU
E3 0 --> JENTSCH JO/RAU
E4 11 JENTSCH K/RAU
E5 66 JENTSCH K D/RAU
E6 1 JENTSCH K L/RAU
E7 26 JENTSCH L/RAU
E8 18 JENTSCH M/RAU
E9 3 JENTSCH N/RAU
E10 5 JENTSCH O/RAU
E11 1 JENTSCH P/RAU
E12 16 JENTSCH R/RAU
Clearly the above search strategy is not going to do a very good job of limiting down the referenced article to the one "in-hand". The author's name is not well delimited, and addition of the publication year is only a little more limiting.
Narrowing the set for the Cited Article (use more bibliographic info)
Including the Publication (i.e. journal) of the Referenced Work: Since you have the referenced paper "in-hand", you also have the publication/journal in which it appeared (/RWK). If you know the abbreviation that ISI uses for that work, it can be entered:=> s jentsch j?/RAU(S)1985/RPY(S)j biol chem/RWK
Knowing the correct abbreviation for a journal can be a problem. To find a journal title abbreviation, you can try expanding your "guess" in the /RWK field to see if it is listed. A bit of trial and error generally gets the correct abbreviation.
Including the Volume Number of the Referenced Work Publication: You also know the volume number of the publication in which the "in-hand" article appeared (generally printed in the header or footer of each page of the article). For journals that publish only one volume number per year (e.g., J. Am. Chem. Soc., J. Org. Chem.) it is unnecessary to include both. Volume number can be included by:
=> s jentsch j?/RAU(S)1985/RPY(S)j biol chem/RWK (S)264/RVL
Including the Page Number in the Referenced Work Publication: Finally, you know the page numbers of the article. ISI works from the page numbers in the citation. So it is often wise to use a range of page numbers. For example, if the "in-hand" article appeared on pages 100-107, then use something like:
=> s jentsch j?/RAU(S)1985/RPY(S)j biol chem/RWK(S)264/RVL(S)100-110/RPG
or
=> s jentsch j?/RAU(S)1985/RPY(S)j biol chem/RWK (S)264/RVL(S)110>RPG>100
The above search command is perhaps overkill. Generally, a combination of the author (/RAU), journal (/RWK), and publication year (/RPY) [joined together with (S) to require that they all appear in the same citation] should be able to limit the hits down to only articles that have cited the "in-hand" article in their footnotes.
Note Well: Before proceeding further, it is prudent to check to make sure you are getting articles that in fact do cite (footnote) your "in hand" article. Display the first record (ALL format) and check in the RE section of the record to make sure that your "in hand" article is there.
Getting ALL references that cite the referenced ("in-hand") article is good, but who knows why they might have referenced your article. If you get a bunch of hits for a search that you are pretty sure is limited to just your "in-hand" article, the next step is to use the bibliographic information in the referencing articles (the citing articles) to limit down the set.
This operates in exactly the same fashion as STN searches in ca and lca. You can read above about the searchable fields (in the referencing articles). Note that these fields do NOT start with an "R".
So search topics (or authors, or whatever) that will define the articles that you are seeking. Use the same search strategy techniques that you used in ca and lca.
Then AND the resulting L-numbered sets of records together with the L-numbered set of records that you already generated based on the bibliographic information for the "in-hand" article.
Once you have a L-numbered set of records that contains the references/records that you want (articles that reference your "in-hand" article and seem to be of relevant subject content), you will need to:
Display the records in the format that contains all the information you need.