Open J. Discrete Math. Vol.7 No.1, January 23, 2017 DOI:10.4236/ojdm.2017.71004
Open J. Discrete Math. Vol.7 No.1, January 23, 2017 DOI:10.4236/ojdm.2017.71003
Open J. Discrete Math. Vol.7 No.1, December 30, 2016 DOI:10.4236/ojdm.2017.71002
Open J. Discrete Math. Vol.7 No.1, December 06, 2016 DOI:10.4236/ojdm.2016.71001
Open J. Discrete Math. [ISSUE], [PUBDATE] DOI:[DOI]