Spatial Modelling with Geometric Constraints. - Bernhard Seybold; Felix J. Metzger; G. Ogan; J. Bathelt; Fabian Collenberg; J. Taiber; Klaus Simon; M. Engeli (PACT, 1997)

Using Blocks for Constraint Satisfaction. - Bernhard Seybold; Felix J. Metzger; G. Ogan; Klaus Simon (CP, 1998)