Translation:I support researchers and students.
So in a list of people we only need one 'a'? No 'a' before estudiantes?
What is the "a" for?
personal 'a' because the direct objects are people??
Yes, the verb 'support' is acting on the people.
i thought the personal "a" was only needed for specific people, not general types of people? (as explained at the bottom of the page at this link) http://www.studyspanish.com/lessons/persa.htm
I think they are trying to show us here that the personal a is used for specific groups of people. Somewhere in context that was to be assumed