Kälberer, N., Böhmer, C., Tschirpke, K., Petendra, B. and Beck-Meuth, E. M. (2014) “Preparatory Mathematics Course for Non-Traditional Engineering Students”, International Journal of Engineering Pedagogy (iJEP), 4(4), pp. pp. 51–58. doi: 10.3991/ijep.v4i4.3999.