Chandrasekhar, S.
George Allen and Unwin, 1955
Buku Teks
Coale, Ansley J.
Princeton University Press, 1958
Buku Teks
Coale, Ansley J.
Princeton University PRess, 1972
Buku Teks SO
Coale, Ansley J.
Princeton University Press, 1961
Buku Teks SO
Agarwala, S. N.
Tata McGraw-Hill, 1977
Buku Teks