1. Homogeneous multidimensional differential systems for mathematical models;Jenks;J. Differential Eqs.,1968
2. Homogeneous non-negative symmetric quadratic transformations;Blakely;Bull. Am. Math. Soc.,1965
3. Blakeley, G. R., and Dixon, R. D., The sequence of iterates of a non-negative nonlinear transformation. In preparation.
4. Kesten H., Quadratic transformations; a model for population growth. In preparation.