Kovach, Ladis D., author
Holden-Day, 1984
Buku Teks
Johnson, David E., author
Ronald Press, 1965
Buku Teks
Stakgold, Ivar, author
Society for Industrial and Applied Mathematics, 2000
eBooks
Faddeev, L. D., author
World Scientific, 2015
Buku Teks
Reed, Michael
California Academic Press , 1980
Buku Teks