Saltzman, M. D. (1986). "The development of physical organic chemistry in the United States and the United Kingdom: 1919–1939, parallels and contrasts". Journal of Chemical Education. 63 (7): 588. Bibcode:1986JChEd..63..588S. doi:10.1021/ed063p588.(subscription required)
Ingold, Christopher K. (1934). "Principles of an Electronic Theory of Organic Reactions". Chemical Reviews. 15 (2): 238–274. doi:10.1021/cr60051a003.
Saltzman, M. D. (1980). "The Robinson-Ingold controversy: Precedence in the electronic theory of organic reactions". Journal of Chemical Education. 57 (7): 484. Bibcode:1980JChEd..57..484S. doi:10.1021/ed057p484.
harvard.edu
ui.adsabs.harvard.edu
Saltzman, M. D. (1986). "The development of physical organic chemistry in the United States and the United Kingdom: 1919–1939, parallels and contrasts". Journal of Chemical Education. 63 (7): 588. Bibcode:1986JChEd..63..588S. doi:10.1021/ed063p588.(subscription required)
Saltzman, M. D. (1980). "The Robinson-Ingold controversy: Precedence in the electronic theory of organic reactions". Journal of Chemical Education. 57 (7): 484. Bibcode:1980JChEd..57..484S. doi:10.1021/ed057p484.