Timotius, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1995
UI - Skripsi (Membership)
Krushkal, Samuil L. (Samuil Leĭbovich), author
V.H Winston & Sons, 1979
Buku Teks
Napier, Terrence, author
Springer, 2011
eBooks
Bogatyrev, Andrei, author
Springer, 2012
eBooks
Accola, Robert D.M., author
Springer-Verlag, 1994
Buku Teks