Josceanu A, Dumitrescu A, Danciu T, Isopescu R, Postelnicescu P, Plesu V, Stefan C. E-learning Today. Chemical Engineering Transactions [Internet]. 20Aug.2010 [cited 22Nov.2024];21:1057-62. Available from: https://www.cetjournal.it/index.php/cet/article/view/CET1021177