1. Baier, W., Davison, H., Desjardins, R.L., Ouellet, C.E., and Williams, G.D.V.: 1976, ?Recent Biometeorological Applications to Crops?, Int. J. Biometeor. 20, 108?127.
2. Barreto, L.S. and Soares, F.A.: 1974, ?Zonagem Provisória de Mocambique Pelo Indice Climático de Potencialidade Agricola de Turc?, Rev. Ciencias Agronom., 7, 45?52.
3. Dumanski, J. and Stewart, R.B.: 1981, ?Crop Production Potentials for Land Evaluation in Canada?, Report, Research Branch, Agriculture Canada, Ottawa.
4. Kimball, B.A.: 1983, ?Carbon Dioxide and Agricultural Yield: An Assemblage and Analysis of 430 Prior Observations?, Agron. J. 75, 779?788.
5. Geography and the Properties of Surfaces Series;E.E. Lozano,1968