Ulrich Langer, editor
Springer-Verlag , 2012
eBooks
edited by Robert Grossman
Society for Industrial and Applied Mathematics, 1989
eBooks
Dahlquist, Germund, author
Society for Industrial and Applied Mathematics, 2008
eBooks
Cambridge University Press, 1990
Buku Teks
Paris : The United Nations Educational
Majalah, Jurnal, Buletin