TETAN, Romulus. “FOREWORD - ANNIVERSARY OF PROFESSOR AUREL POP”. Studia Universitatis Babeș-Bolyai Physica, vol. 63, no. 1-2, Dec. 2018, pp. 5-7, https://studia.reviste.ubbcluj.ro/index.php/subbphysica/article/view/3121.