Lynch, R. 1998. Successful pair-housing of male macaques (Macaca fascicularis). Laboratory Primate Newsletter 37(1), 4-5.

Potential companions were paired after establishment of a clear dominance-subordination relationship during a noncontact familiarization period. Throughout a follow-up period of 12-42 months, 16 of the 17 original pairs (94%) were compatible. Only one pair engaged in fighting shortly after pairing and was separated because of injuries.