Anderson, J. H., Houghton, P. 1983. The pole and collar system. A technique for handling and training nonhuman primates. Lab Animal 12(6), 47-49.

The single-housed subject wears a permanent collar and is caught with a pole, using the squeeze-back to control his/her position. A trained animal allows itself to be caught with little resistance. Many animals which are handled extensively will present the collar ring. ... Conditioning and training animals to allow restraint and manipulation is an effective technique to prevent stress and reduce the need for immobilizing agents. Trained nonhuman primates are both easier and safer to handle.