ProQuest - sample search:
Akin, Omer, and Cem Akin. "On the Process of Creativity in Puzzles, Inventions, and Designs." Autom Constr, vol. 7, no. 2-3, 1998, pp. 123-138, Technology Collection, http://myaccess.library.utoronto.ca/login?url=https://search-proquest-com.myaccess.library.utoronto.ca/docview/26682375?accountid=14771.
Klymchuk, Sergiy. "Puzzle-Based Learning in Engineering Mathematics: Students' Attitudes." International Journal of Mathematical Education in Science and Technology, vol. 48, no. 7, 2017, pp. 1106-1119, Technology Collection, http://myaccess.library.utoronto.ca/login?url=https://search-proquest-com.myaccess.library.utoronto.ca/docview/1928788605?accountid=14771, doi:http://dx.doi.org.myaccess.library.utoronto.ca/10.1080/0020739X.2017.1327088.