1. An Introduction to the Study of Stellar Structures;Chandrasekhar,1967
2. The distribution of stars in galactic nuclei: loaded polytropes;Huntley;The Astrophysical Journal,1975
3. A study of simple polytropes;Kimura;Publications of the Astronomical Society of Japan,1981
4. Hydrodynamical models of gaseous stars;Ducomet;Reviews of Mathematical Physics,1996