Jürg Nievergelt. Computing with geometric objects. ACM Comm. Computer Algebra, 18(2):19, 1984. [doi]
@article{Nievergelt84-0, title = {Computing with geometric objects}, author = {Jürg Nievergelt}, year = {1984}, doi = {10.1145/1089369.1089377}, url = {http://doi.acm.org/10.1145/1089369.1089377}, researchr = {https://researchr.org/publication/Nievergelt84-0}, cites = {0}, citedby = {0}, journal = {ACM Comm. Computer Algebra}, volume = {18}, number = {2}, pages = {19}, }