Olewnik, Andrew, Randy Yerrick, Amanda Simmons, Yonghee Lee, and Brian Stuhlmiller. 2020. “Defining Open-Ended Problem Solving Through Problem Typology Framework”. International Journal of Engineering Pedagogy (iJEP) 10 (1):pp. 7-30. https://doi.org/10.3991/ijep.v10i1.11033.