Fedor V. Fomin Fabrizio Grandoni Dieter Kratsch Solving Connected Dominating Set Faster than 2<sup> <i>n</i> </sup>. 153-166 2008 52 Algorithmica 2 http://dx.doi.org/10.1007/s00453-007-9145-z db/journals/algorithmica/algorithmica52.html#FominGK08