title = {BIRCH : An efficient data clustering method for very large databases},
author = {T. Zhang and R. Ramakrishnan and M. Livny}, booktitle = {Proceedings of the 1996 ACM SIGMOD international conference on Management
of Data (SIGMOD'96)}, month = {June}, pages = {103--114}, publisher = {ACM Press}, year = {1996},
keywords = {FCA OntologyHandbook }