Peterson, G., Kelly, K., Miller, L. 1988. Use of an artificial gum-tree feeder for marmosets. Animal Keepers Forum 15, 396-401.

Having the opportunity to demonstrate their natural gum-foraging behavior stimulated some of the animal's other natural behaviors, i.e., compatible sharing of feeders and feeding sites, methods of food acquisition, and territoriality and dominance. .... The gum-filled syringe was used for oral medication without stressing the animals in any way. [This work has also been published in: