Michael Laszlo Sumitra Mukherjee Minimum Spanning Tree Partitioning Algorithm for Microaggregation. 902-911 2005 17 IEEE Trans. Knowl. Data Eng. 7 http://doi.ieeecomputersociety.org/10.1109/TKDE.2005.112 db/journals/tkde/tkde17.html#LaszloM05