@InProceedings{ilps97,
  author = 	 {E. Todoran and J.I. den Hartog and E.P. de Vink},
  title = 	 {Comparative metric semantics for commit in or-parallel logic programming},
  booktitle = 	 {Proc. Symposium on Logic Programming},
  pages =	 {101--116},
  year =	 1997,
  editor =	 {J. Maluszynski},
  publisher =	 {The MIT Press}
}