The best way to search for citations is by using the "Cited Reference Search"
NOTE:Be careful about verifying pre-1974 citations by using "search" or "advanced search". Pre-1974 are not indexed in the "search" and "advanced search" search engine; you will come up with no hits. By using Cited Reference Search you will be able to see the how many times the pre-1974 article was cited, but you will not be able to obtain the specific results. At the present time we have no way of doing a citation search on an article published before 1974.