1. Chandrasekhar, S. and Lebovitz, N.: 1962,Astrophys. J. 136, 1082.
2. Daniel, J. and Moore, R.: 1970,Computation and Theory in Ordinary Differential Equations, W. H. Freeman and Co., San Francisco.
3. Geroyannis, V. S.: 1988,Astrophys. J. 327, 273 (Paper I).
4. Geroyannis, V. S.: 1990,Astrophys. J. 350, 355 (Paper II).
5. Geroyannis, V. S. and Antonakopoulos, G. A.: 1981,Astrophys. Space Sci. 79, 367.