Epstein, Benjamin
CRC Press (Taylor & Francis Group), 2008
Buku Teks SO
Edelstein-Keshet, Leah
Society for Industrial and Applied Mathematics, 2005
eBooks
Jones, A.J.
Ellis Horwood and John Wiley & Sons, 1980
Buku Teks SO
Chartrand, Gary
Prindle, Weber & Schmidt , 1977
Buku Teks SO
Brauer, Fred
Springer Science, 2012
eBooks