Recommendation letter

• Who Should You List as References for a PhD Application?
  Choose PhD references who can speak specifically about your research ability, academic preparation, and potential, then ask early and share useful materials.
• How to Ask a Professor You Barely Know for a Postdoc Recommendation
  You can ask a professor who barely knows you, but make it easy to assess your work: explain the connection, share materials, give a deadline, and allow an honest no.