Gaudio, G. del; Refugio, C. N.; Jurcic, I.; Corte, V. D.; James, D. F.; Said, M. M. T.; Sawicka, B.; Mohan, T. R.; Aravind, V. R.; Umachandran, K.; Amuthalakshmi, P. Designing Learning-Skills towards Industry 4.0. WJET 2019, 11, 150-161.