Epstein, Benjamin
CRC Press (Taylor & Francis Group), 2008
Buku Teks
Edelstein-Keshet, Leah
Society for Industrial and Applied Mathematics, 2005
eBooks
Jones, A.J.
Ellis Horwood and John Wiley & Sons, 1980
Buku Teks
Chartrand, Gary
Prindle, Weber & Schmidt , 1977
Buku Teks
Ottesen, Johnny T.
Society for Industrial and Applied Mathematics, 2004
eBooks