Paola Flocchini Linda Pagli Giuseppe Prencipe Nicola Santoro Peter Widmayer Computing all the best swap edges distributively. 976-983 2008 68 J. Parallel Distrib. Comput. 7 http://dx.doi.org/10.1016/j.jpdc.2008.03.002 db/journals/jpdc/jpdc68.html#FlocchiniPPSW08