Chris G. Richardson, Chizimuzo T. C. Okoli, Pamela A. Ratner and Joy L. Johnson
Addiction 105 ( 10 ): 1827 - 1834 , 2010
Chizimuzo T.C. Okoli, Chris G. Richardson, Pamela A. Ratner and Joy L. Johnson
Addictive Behaviors 34 ( 12 ): 1010 - 1016 , 2009