1. Arave, C. W. and Kilgour, R. Differences in grazing and milking behaviour in high and low breeding index cows. Proceedings of the New Zealand Society of Animal Production. Vol. 42, pp.65–67.
2. Bryant, A. M. The efficiency of cows differing in breeding index. Proceedings of the Ruakura farmers' conference. Vol. 33, pp.145–148.
3. Bryant, A. M. and Macmillan, K. L. Comparative performance of Jerseys and Friesians. Proceedings of the Ruakura farmers' conference. Vol. 37, pp.87–93.
4. Campbell, A. C. Comparative dairy production of Jerseys and Friesian-Jersey crossbreds. Proceedings of the New Zealand Society of Animal Production. Vol. 57, pp.25–31.