Tomás Feder Rajeev Motwani An Zhu k-connected spanning subgraphs of low degree. 2006 13 Electronic Colloquium on Computational Complexity (ECCC) http://eccc.hpi-web.de/eccc-reports/2006/TR06-041/index.html 041 db/journals/eccc/eccc13.html#FederMZ06