1 & 2. JSTOR and Project Muse
JSTOR is a favorite with its full texts in core journals of all disciplines. Project Muse does not include exactly the same JSTOR journals, but it has more recent and current articles on many topics.
3. Academic OneFile
(All subjects, including Photography; a convenient quick start; Here are some sample findings.)
4. ARTbibliographies Modern (most comprehensive; late 1960's - present)
More Art & Art History databases:
International Bibliography of Art (1998 - present)
Art Full Text and Retrospective (1929 - present; “select” Full Text 1997- present)
5. When use GoogleScholar, set your Library Links to access Tufts full texts.
How:
Search, in Arts and Humanities Citation Index, for the article you have read.
For example:
Rosenthal, Maurice J. "Relationships Between Form and Feeling in the Art of Picasso" American Imago 8: 4 (1951), 371-391.
References: 22 Times Cited: 3
You can, then, look up, in the record, the 22 references that Rosenthalcited for his article and, in turn, 3 articles (so far) that cited his. The assumption is that these articles address related issues.
Note:
1. Not every single article is cited;
2. Influential authors are cited more often;
3. More recent publications take time to be cited.