Bugge, Günther (). Das Buch Der Grossen Chemiker. II. Berlin: Verlag Chemie. pp. 336–350.
McCay, Leroy Wiley (). „My Student Days in Germany”. The Journal of Chemical Education. 7 (5): 1081–1099. Bibcode:1930JChEd...7.1081M. doi:10.1021/ed007p1081. – Extensive comments on Winkler from a student's point-of-view
Volke, Klaus (). „Clemens Winkler – zum 100. Todestag”. Chemie in unserer Zeit. 38 (5): 360–361. doi:10.1002/ciuz.200490078.