Canon or Fanon -- Denethor's attitude toward Elves?

I'm working on a fanfic, and I wanted to make sure I didn't inadvertently pass on fanon. I was hoping that the experts would steer me in the direction of canon.

I remember reading somewhere that Denethor hated Elves, and did not allow them to enter Gondor. Unfortunately, I don't remember the source, so I can't evaluate it. (It feels wrong; after all, Elves and Men were allies against Sauron before, and Denethor, of all people, would know that history.) But I'm not sure where exactly I would find the information in canon.

Thank you in advance!