@article{articlea063502a,
title   = {Formulations and valid inequalities for the node capacitated graph partitioning problem},
author = {Ferreira, Carlos Eduardo and Martin, A. and Souza, C. C. de and Weismantel, Robert and Wolsey, Laurence A},
year = {1996},
doi = {10.1007/bf02592198},
journal   = {Mathematical Programming}
}