Am. J. Oper. Res. Vol.3 No.4, July 16, 2013 DOI:10.4236/ajor.2013.34039
Am. J. Oper. Res. Vol.3 No.4, July 16, 2013 DOI:10.4236/ajor.2013.34038
Am. J. Oper. Res. Vol.3 No.4, July 12, 2013 DOI:10.4236/ajor.2013.34037
Am. J. Oper. Res. [ISSUE], [PUBDATE] DOI:[DOI]