Reinhardt, V. 1987. Advantages of housing rhesus monkeys in compatible pairs. Scientists Center for Animal Welfare Newsletter 9(3), 3-6.

An intelligent, social animals such as a rhesus monkey, ... represents a caricature of its own kind when kept in an artificial environment that is deprived of both animate and inanimate stimulation. Such animals are behavioral cripples, since the whole repertoire of social behavior is inhibited in its active expression.Two pair formation techniques are described. Adult-adult pairs were compatible in 84% of 19 cases, adult-infant pairs were compatible in 91% of 33 cases. Little risk and no extra financial burdens are involved in enriching the barren environment of singly caged rhesus monkeys by carefully socializing them with each other or with surplus infants from breeding troops. German translation of this work has been published in: Alternativen zu Tierexperimenten 7: 45-50, 1987; Reinhardt V, Eisele S, Houser WD; Leben in den K?fig bringen: Sozialisierung bislang einzeln gehaltener Rhesusaffen.