Werner Dilger, Hans Voß. Sorts in Qualitative Reasoning. In Sorts and Types in Artificial Intelligence. pages 190-207, 1989.
@inproceedings{DilgerV89, title = {Sorts in Qualitative Reasoning}, author = {Werner Dilger and Hans Voß}, year = {1989}, researchr = {https://researchr.org/publication/DilgerV89}, cites = {0}, citedby = {0}, pages = {190-207}, booktitle = {Sorts and Types in Artificial Intelligence}, }