Open J. Discrete Math. Vol.4 No.4, October 17, 2014 DOI:10.4236/ojdm.2014.44014
Open J. Discrete Math. Vol.4 No.4, October 06, 2014 DOI:10.4236/ojdm.2014.44013
Open J. Discrete Math. Vol.4 No.4, September 30, 2014 DOI:10.4236/ojdm.2014.44012
Open J. Discrete Math. [ISSUE], [PUBDATE] DOI:[DOI]