Sutton, B. H. C.
Pitman, 1975
Buku Teks
California Research and Education Association, 1995
Buku Teks
Verma, B.P., author
Khanna Publishers, 1978
Buku Teks
Verma, B.P., author
Khanna Publishers, 1975
Buku Teks
Birkhoff, Garrett, author
Society for Industrial and Applied Mathematics, 1984
eBooks