The main book:
Programming with
Constraints: an Introduction by Kim Marriott and Peter J. Stuckey. This
link leads to lecture slides, slide handouts, and programs introduced in
the book.
Important links to FAQ, Archives, FTP sites, Publications, and others can
be accessed from the Constraint Computation Center at
the University of New Hampshire.
Peter van Beek's page.
Contains links to some of his interesting papers and Software which consists of a `C' library of routines for
solving binary constraint satisfaction problems.