Chandrasekhar, S.
George Allen and Unwin, 1955
Buku Teks
Cassen, R.H.
Macmillan, 1982
Buku Teks SO
Agarwala, S.N.
Tata McGraw-Hill, 1977
Buku Teks SO
Coale, Ansley J.
Princeton University Press, 1958
Buku Teks SO
Coale, Ansley J.
Princeton University Press, 1961
Buku Teks SO