What is the best public, unambiguous, non-YouTube reference I can cite for the late David Mills' initial FTP work? I see that the wording on his Wikipedia page has the ambiguous phrase "had the first implementation of FTP", which has been flagged as needing clarification, so I intend to provide it. In both this interview: https://conservancy.umn.edu/bitstream/handle/11299/113899/oh403dlm.pdf ... and this video recording of Mills himself giving a lecture at UDel: https://youtu.be/08jBmCvxkv4?t=428 ... it's quite clear that it's literally true - he authored, compiled, installed, implemented, and tested the very first (and apparently second) FTP server. But Wikipedia's guidelines discourage YouTube-only citations, and the text in the interview seems insufficiently detailed to have citation value. What is the best reference I can cite? Thanks! -- Royce