Approximating min-sum \(k\)-clustering in metric spaces. (English) Zbl 1323.68565
Proceedings of the thirty-third annual ACM symposium on theory of computing, STOC 2001. Hersonissos, Crete, Greece, July 6–8, 2001. New York, NY: ACM Press (ISBN 1-581-13349-9). 11-20 (2001).