A collaborator of mine has finished and defended his phd thesis, he has also submitted one chapter of the thesis as an article, and now this article is under review.
I am submitting an article and I want to cite this work, which one of the two should I cite? And if I cite the article should I use "Smith et. al, in review unpublished or pers. communication"
I was thinking that even though not peer-reviewed, a thesis might be better than something under review.