Ernesto Bribiesca. Arithmetic operations among shapes using shape numbers. Pattern Recognition, 13(2):123-137, 1981. [doi]
@article{Bribiesca81,
title = {Arithmetic operations among shapes using shape numbers},
author = {Ernesto Bribiesca},
year = {1981},
doi = {10.1016/0031-3203(81)90010-8},
url = {http://dx.doi.org/10.1016/0031-3203(81)90010-8},
researchr = {https://researchr.org/publication/Bribiesca81},
cites = {0},
citedby = {0},
journal = {Pattern Recognition},
volume = {13},
number = {2},
pages = {123-137},
}