@book{cochran_cox_1957, title={Experimental designs}, publisher={New York: Wiley}, author={Cochran, William G. and Cox, Gertrude M.}, year={1957} }
 @book{william g. cochran_cox_1950, title={Experimental designs}, publisher={New York: Wiley}, author={William G. Cochran and Cox, Gertrude M.}, year={1950} }