Shearer, Peter M.
Cambridge University Press, 1999
Buku Teks SO
Sheriff, Robert E.
Cambridge University Press, 1994
Buku Teks SO
Tito Prastianto
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2004
UI - Tesis Membership
Keller, Edward A.
Prentice-Hall, 1996
Buku Teks SO
Cai, Yiben
Zhengzhong shuju yinxing, 1984
Buku Teks