Epstein, Benjamin
CRC Press (Taylor & Francis Group), 2008
Buku Teks
Edelstein-Keshet, Leah
Society for Industrial and Applied Mathematics, 2005
eBooks
Livingston, John Leslie
McGraw-Hill, 1970
Buku Teks
Chartrand, Gary
Prindle, Weber & Schmidt , 1977
Buku Teks
Brauer, Fred
Springer Science, 2012
eBooks