Hill View Llamas, Frodsham

Grazing Behaviour and Dry Matter Intake of Llamas (Lama Glama) and German Black- Head Mutton Sheep (Ovis Orientalis Forma Aries) under Central Euro... ."

https://www.ncbi.nlm.nih.gov/pubmed/26591388.

Suckling Behaviour of Llama (Lama Glama Glama) and Chapman's Zebra (Equus Burchelli Antiquorum) in Captivity". (http://www.sciencedirect.com/science/article/pii/0304376281900869).

Feeding Behaviour of Camelids. (http://elib.tiho-hannover.de/dissertations/stoelzla_ws15.pdf).

Taylor-Browne, J. Do they spit?

http://www.carthveanalpacas.com/Do%20they%20spit.pdf