Huffer, Charles M.
Holt Rinehart & Winston, 1967
Buku Teks
Cavin, Jerry D., author
Springer, 2012
eBooks
Hans Adhitya, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2019
UI - Skripsi (Membership)
Friedman, John L., author
Cambridge University Press, 2013
Buku Teks
Abhyankar, K.D.
Tata McGraw-Hill, 1992
Buku Teks