DeGeorge, Richard T.2015-03-032015-03-031960De George, Richard T. "Duties and Ideals in Leonard Nelson's Ethics." Kant-Studien. Volume 51, Issue 1-4, Pages 259–271, http://dx.doi.org/10.1515/kant.1960.51.1-4.259, September 2009https://hdl.handle.net/1808/16952Article10.1515/kant.1960.51.1-4.259openAccess