Greenberg, Bernard G.; Cox, Gertrude M.; Mason, David D.; Grizzle, James E.; Johnson, Norman L.; Jones, Lyle V.; Monroe, John; Simmons, Gordon D. Jr. (1978), Nourse, E. Shepley (ed.), "Statistical Training and Research: The University of North Carolina System", International Statistical Review, 46: 180–181, doi:10.2307/1402812, JSTOR1402812
jstor.org
Greenberg, Bernard G.; Cox, Gertrude M.; Mason, David D.; Grizzle, James E.; Johnson, Norman L.; Jones, Lyle V.; Monroe, John; Simmons, Gordon D. Jr. (1978), Nourse, E. Shepley (ed.), "Statistical Training and Research: The University of North Carolina System", International Statistical Review, 46: 180–181, doi:10.2307/1402812, JSTOR1402812