Reiss, Michael
University Press, 2000
Buku Teks
edited by S.K. Jain and L.W. Botsford
Kluwer Academic Publishers, 1992
Buku Teks
Waltman, Paul
Society for Industrial and Applied Mathematics, 1983
eBooks
Ennos, A.R.
Longman Scientific & Technical, 1995
Buku Teks
edited by J.N.R. Jeffers
Parthenon, 1992
Buku Teks