Fox, M. W. 1986. Laboratory Animal Husbandry: Ethology, Welfare and Experimental Variables. State University of New York Press, Albany, NY.

Clear discussion and comprehensive review of housing- and handling-related variables affecting research data. Cage size is probably determined more by tradition, economics, and some vague subjective impression about the animal's space requirements. ... The 'queue' effect of treating animals sequentially is an often overlooked experimental variable.