I am a Ph.D. student who will get a Ph.D. degree in less than 8 months in biophysics. While I am looking for postdoc positions many of them require three recommendation letters. One of these letters will be provided by my supervisor, however, what can I do about the other two?
I collaborated with other researchers on my projects, however, the collaboration was kind of at a distance while the collaborators were in another country.
Is it possible to ask these collaborators for a recommendation letter? How could they evaluate me while they never worked with me directly or in person? They usually provided samples or commented on the draft I wrote, however, I did not interact with them the way I discussed the project with my supervisor.