Townsend, Michael, author
The Benjamin Cumming, 1987
Buku Teks
edited by Murray S. Klamkin
Society for Industrial and Applied Mathematics, 1995
eBooks
Kao, Charles K., author
McGraw-Hill, 1982
Buku Teks
Penfold, R.A.
Bernard Babani, 1995
Buku Teks
Arifin Djauhari, author
Fakultas Teknik Universitas Indonesia, 1994
UI - Laporan Penelitian