Agarwala, S.N.
Tata McGraw-Hill, 1977
Buku Teks
Cassen, R.H.
Macmillan, 1982
Buku Teks
Ghosh, Dipak
S.l. s.n. 19-,
Buku Teks
Chandrasekhar, S.
University of North Carolina Press, 1972
Buku Teks
Parkinson, Patrick
Cambridge University Press, 2011
Buku Teks