Froberg, Carl-Erik, author
Addison-Wesley, 1972
Buku Teks
Stoer, Josef, author
Springer-Verlag, 1993
Buku Teks
Norris, A.C., author
John Wiley & Sons, 1981
Buku Teks
Stewart, Gilbert W., author
Society for Industrial and Applied Mathematics, 1998
eBooks
Elnashaie, Said.
Springer, 2007
Buku Teks