@Book{Schulte:LNAI:2002,
   Author =    "Christian Schulte",
   Title =     "Programming Constraint Services",
   Publisher = "Springer-Verlag",
   Series =    "Lecture Notes in Artificial Intelligence",
   Volume =    "2302",
   Year =      2002,
   URL =       "http://link.springer.de/link/service/series/0558/tocs/t2302.htm"
}