Earnshaw, Rae A.
Springer-Verlag, 1992
Buku Referensi
edited by Gary Rodrigue
SIAM, 1988
Buku Teks SO
Croarken, Mary
Clarendon Press, 1990
Buku Teks SO
Pitt-Francis, Joe
Springer, 2012
eBooks
O`Leary, Dianne P.
Society for Industrial and Applied Mathematics, 2009
eBooks