@conference{Haselbock93,
author = "Alois Haselb{\"o}ck",
address = "ijcai93l",
booktitle = "ijcai93p",
month = "aug",
pages = "282-287",
title = "{E}xploiting {I}nterchangeabilities in {C}onstraint
                   {S}atisfaction {P}roblems",
year = "1993",
}