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W. Jagusiak, Ptak, E., and Zarnecki, A., Relationship between fertility and intermediate optimum type traits in Polish HF, Proceedings of the World Congress on Genetics Applied to Livestock Production, vol. Species Breeding: Dairy cattle and buffalo breeding (jointly with Interbull) - Poster sessions, p. 0398, 2010.
E. Ptak and Zarnecki, A., Estimation of breeding values of Polish Black-and-White cattle using test day yields., vol. 23: Opening: plenary; technology; transfer; beef cattle; dairy cattle; pigs., pp. 335–338, 1998. (292.25 KB)
E. Ptak, Bieniek, J., and Jagusiak, W., Comparison of growth curves of purebred and crossbred rabbits., Proceedings of the World Congress on Genetics applied to Livestock Production, vol. 19. Selection and quantitative genetics; growth; reproduction; lactation; fish; fiber; meat., pp. 201–204, 1994. (215.1 KB)