I previously found sources, however I am having a hard time trying to find them again.
To retrieve article by URL, log into the database, keep it open and then click the article URL. This might work for Gale and ProQuest databases.
To retrieve an article by document number, log into the relevant database, go to Advanced Search, enter the number and choose the relevant field identification (Record Number, Document ID,...) in the Index Box, <search> and retrieve the document.
Remember to include if the number contains any prefixes like A, ED, EJ......
Contact your campus librarians for further assistance.