1. Ranks and relationships in Highland ponies and Highland cows;Clutton-Brock;Z. Tierpsychol.,1976
2. Observations of equine animals under farm and feral conditions;Collery;Equine Vet. J.,1974
3. Behaviour of feral horses in the Pryor Mountain Wild Rose Range;Feist,1971
4. Models pour l'analyse des relations d'associations binaires;Gallais;Biom.-Praxim.,1970
5. Methods for Statistical Data Analysis of Multivariate Observations;Gnanadesikan,1977