A PTAS for delay minimization in establishing wireless conference calls.

Leah Epstein Asaf Levin A PTAS for delay minimization in establishing wireless conference calls. 88-96 2008 5 Discrete Optimization 1 http://dx.doi.org/10.1016/j.disopt.2007.11.004 db/journals/disopt/disopt5.html#EpsteinL08