I am currently writing a paper together with an exchange student of an international academic internship program. As it is common practice, I disclose the research grant, which funds my work. However, the student is paid by the exchange program. He did most of the work and is first author. I am his supervisor and continuously guided his work, though.
Would it be required or is it good practice to disclose the source of his payment or is the grant of my superordinated research project sufficient?