To meet this condition Kaluznin began working at the Humboldt University in Berlin in 1951 - first as a lecturer, and then later, after habilitation with his thesis Stable automorphism groups, as a full professor.
Upang matugunan ang kundisyong ito Kaluznin nagsimula nagtatrabaho sa Humboldt University sa Berlin sa 1951 - unang bilang isang lektor, at pagkatapos, pagkatapos habilitation sa kanyang tesis pirmi automorphism grupo, bilang isang buong propesor.