Enrique H. Ruspini. A New Approach to Clustering. Inf. Comput., 15(1):22-32, July 1969.
@article{Ruspini69, title = {A New Approach to Clustering}, author = {Enrique H. Ruspini}, year = {1969}, month = {July}, tags = {systematic-approach}, researchr = {https://researchr.org/publication/Ruspini69}, cites = {0}, citedby = {0}, journal = {Inf. Comput.}, volume = {15}, number = {1}, pages = {22-32}, }