Trapp S, Ramollari E, Heintz M, Weber S, Dranidis D, Börstler J. Collaborative Learning of UML and SysML. Int. J. Eng. Ped. [Internet]. 2011 Jun. 30 [cited 2024 May 4];1(2):pp. 6-12. Available from: https://online-journals.org/index.php/i-jep/article/view/1663