JSTOR now has DOIs for some of the articles they archive. For example, check out http://dx.doi.org/10.2307/3327064. This is a great service, especially since the old way of citing articles at JSTOR was hopelessly cumbersome (the article linked to above used to have to be linked to as
http://links.jstor.org/sici?sici=0003-2638%28196312%2924%3A2%3C33%3ACIADL%3E2.0.CO%3B2-E,
which is hardly an easy to deal with link).
The annoying thing is that if your internet connection comes from an institution that subscribes to JSTOR, you can’t see what the DOI for an article is. The DOI is only exposed if you’re not recognized as a subscriber. How backward is that? I asked JSTOR tech support about this and they said that they are working on a better way of exposing the DOIs. For now, they recommend that one check whether an article has a DOI by entering the bibliographic info into the DOI finder at CrossRef, which is a bit finicky and also requires one to prove that one is human by filling out one of those captcha thingies.