On the alias "Uni"
Professor Petio Petkov observed in November 2003 that Emanouil Ivanov (1857-1925), one of the eminent first professors of the Sofia University, has been the author who published under the alias "Uni". Namely, a list of Emanouil Ivanov's works can be found in
and the coincidence is evident from that list.
Списание на Физико-математическото дружество в София, год. XI, март 1926 г., кн. 4, 173-176,