Brecht, Arnold
Princenton University Press, 1968
Buku Teks
Gower, Barry
Routledge, 1997
Buku Teks
edited by F.C. Bartlett
Kegan Paul, Trench, 1946
Buku Teks
Vogel, Curtis R.
Society for Industrial and Applied Mathematics, 2002
eBooks
Springer-Verlag, 1969
Buku Teks