found: Raid, N. Tartu ehitusmeistrid 17. sajandist kuni 19. sajandi keskpaigani, 1987:t.p. (Sulev Vahtre)
found: Kahk, J. Eesti NSV ajaloost, 1967(S. Vahtre; Sulev Kheĭnrikhovich Vakhtre)
found: Muinasaja loojangust omariikluse läveni, 2001:t.p. (Sulev Vahtre) p. 13 (b. July 7, 1926; historian)
found: Vikipeedia (Estonian), June 23, 2020(Sulev Vahtre; until 1937: Vinkmann; born July 7, 1926 in Laiuse vald, Tartumaa; died August 31, 2007 in Tartu; Estonian historian, professor at University of Tartu) - https://et.wikipedia.org/wiki/Sulev_Vahtre