13.10 REFERENCIAS

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• Madalena F.E. (1993) A simple scheme to utilize heterosis in tropical dairy cattle. World Animal Review. 74/75: 17-25.
• Martínez N., Escobar A., López S., Combellas J., Gabaldon L. (1993) Effect of strategic feed supplementation on productive and reproductive performance in dual-purpose cows. In “Development of feed supplementation strategies for improving ruminant productivity on small-holder farms in Latin America through the use of immunoassay techniques”. Proceedings Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture. Piracicaba, Brazil. 135-144 p.
• Maule J.P. (1990) The cattle in the tropics. University of Edinburgh, Centre for Tropical Veterinary Medicine: p 225.
• Minson D.J. (1990) Forage in Ruminant Nutrition. Academic Press Inc., U.S.A.
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• Preston T.R., Leng R.A. (1987) Matching ruminant production systems with available resources in the tropics and sub-tropics. Penambul Books, Armidale, Australia.
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