Hutchison GB, Rothman KJ. Correcting a bias? [editorial]. N Engl J Med. 1978 Nov 16;299(20):1129-30. doi: 10.1056/NEJM197811162992010
Rothman KJ. Occam's razor pares the choice among statistical models. Am J Epidemiol. 1978 Nov;108(5):347-9.