Authors will list the books and journal articles they themselves have referred to in their research, and these are known as cited references or citations. Scopus as well as the ISI Citation Databases SciSearch and Social SciSearch store these references, and enable you to use them as search terms. By this means it is possible to identify articles which have made a reference to a particular book or journal.
Articles which cite the same reference are likely to be about similar areas of research.
An important work can be recognised by the number of times it has been cited, and is therefore likely to be of particular interest
This method of searching is the only means of searching forward from an older article or book by an author that you know about, to more recent publications on the same subject which have cited that author.