@InProceedings{robin,
author  = {Martin Henz},
title   = {Constraint-based Round Robin Tournament Planning},
booktitle = {Proceedings of the 1999 International Conference on Logic
		  Programming},
editor = {Danny De Schreye},
year = {1999},
publisher = {The MIT Press},
address = {Cambridge, Massachusetts},
pages = {545--557}
}