Accola, Robert D.M.
Springer-Verlag, 1994
Buku Teks
Krushkal, Samuil L. (Samuil Leĭbovich)
V.H Winston & Sons, 1979
Buku Teks
Bogatyrev, Andrei
Springer, 2012
eBooks
Andersson, Lars-Erik
Society for Industrial and Applied Mathematics, 2010
eBooks
Mohamed Abdelrehim Selim Ibrahim Elshobaki
TASK, 2017
Artikel Jurnal