Open J. Discrete Math. Vol.7 No.2, April 30, 2017 DOI:10.4236/ojdm.2017.72010
Open J. Discrete Math. Vol.7 No.2, April 24, 2017 DOI:10.4236/ojdm.2017.72009
Open J. Discrete Math. Vol.7 No.2, April 19, 2017 DOI:10.4236/ojdm.2017.72008
Open J. Discrete Math. Vol.7 No.2, April 19, 2017 DOI:10.4236/ojdm.2017.72007
Open J. Discrete Math. Vol.7 No.2, April 19, 2017 DOI:10.4236/ojdm.2017.72006
Open J. Discrete Math. [ISSUE], [PUBDATE] DOI:[DOI]