Tyler, Stephanie J. (1 January 1972). "The Behaviour and Social Organization of the New Forest Ponies". Animal Behaviour Monographs. 5: 87–196. doi:10.1016/0003-3472(72)90003-6. ISSN0066-1856.
Ormerod, S. J.; O'Halloran, J.; Gribbin, S. D.; Tyler, Stephanie J. (1991). "The Ecology of Dippers Cinclus cinclus in Relation to Stream Acidity in Upland Wales: Breeding Performance, Calcium Physiology and Nestling Growth". The Journal of Applied Ecology. 28 (2): 419. Bibcode:1991JApEc..28..419O. doi:10.2307/2404559. JSTOR2404559.
Ormerod, S. J.; O'Halloran, J.; Gribbin, S. D.; Tyler, Stephanie J. (1991). "The Ecology of Dippers Cinclus cinclus in Relation to Stream Acidity in Upland Wales: Breeding Performance, Calcium Physiology and Nestling Growth". The Journal of Applied Ecology. 28 (2): 419. Bibcode:1991JApEc..28..419O. doi:10.2307/2404559. JSTOR2404559.
Ormerod, S. J.; O'Halloran, J.; Gribbin, S. D.; Tyler, Stephanie J. (1991). "The Ecology of Dippers Cinclus cinclus in Relation to Stream Acidity in Upland Wales: Breeding Performance, Calcium Physiology and Nestling Growth". The Journal of Applied Ecology. 28 (2): 419. Bibcode:1991JApEc..28..419O. doi:10.2307/2404559. JSTOR2404559.
Tyler, Stephanie J. (1 January 1972). "The Behaviour and Social Organization of the New Forest Ponies". Animal Behaviour Monographs. 5: 87–196. doi:10.1016/0003-3472(72)90003-6. ISSN0066-1856.