Bugge, Günther (1930). Das Buch Der Grossen Chemiker. II. Berlin: Verlag Chemie. pp. 336 – 350
McCay, Leroy Wiley (1930). «My Student Days in Germany». The Journal of Chemical Education. 7 (5): 1081–1099. doi:10.1021/ed007p1081 – Extensive comments on Winkler from a student's point-of-view
Volke, Klaus (2004). «Clemens Winkler – zum 100. Todestag». Chemie in unserer Zeit. 38 (5): 360–361. doi:10.1002/ciuz.200490078
Weeks, Mary Elvira (1932). «The Discovery of the Elements: XV. Some Elements Predicted by Mendeleeff». The Journal of Chemical Education. 9 (9): 1605–1619. doi:10.1021/ed009p1605
Winkler, Clemens (1902). Handbook Of Technical Gas Analysis. London: Taylor and Francis. pp. 336 – 350. Consultado em 9 de fevereiro de 2008 (English translation by George Lunge)