ROȘIORU, C. L. “IN MEMORIAM - Professor Iosif Viehmann (1 September 1925 – 6 August 2016)”. Studia Universitatis Babeș-Bolyai Biologia, vol. 62, no. 1, June 2017, pp. 13-15, http://193.231.18.162/index.php/subbbiologia/article/view/3741.