Whittle, Peter, author
John Wiley & Sons, 1990
Buku Teks
Akulenko, Leonid D., author
Kluwer, 1994
Buku Teks
Chukwu, E.N., author
Academic Press, 1992
Buku Teks
Lions, J.L., author
Society for Industrial and Applied Mathematics, 1972
eBooks
Li, Xunjing, author
Birkhauser, 1994
Buku Teks