Augmenting a graph of minimum degree 2 to have two disjoint total dominating sets.

Michael Dorfling Wayne Goddard Johannes H. Hattingh Michael A. Henning Augmenting a graph of minimum degree 2 to have two disjoint total dominating sets. 82-90 2005 300 Discrete Mathematics 1-3 http://dx.doi.org/10.1016/j.disc.2005.06.020 db/journals/dm/dm300.html#DorflingGHH05