Aua-aree Boonperm และ Krung Sinapiromsaran. (2013) Artificial-Variable-Free simplex method for frimal and dual linear programming models. Chulalongkorn University:ม.ป.ท.Aua-aree Boonperm และ Krung Sinapiromsaran. 2013. Artificial-Variable-Free simplex method for frimal and dual linear programming models. ม.ป.ท.:Chulalongkorn University;Aua-aree Boonperm และ Krung Sinapiromsaran. Artificial-Variable-Free simplex method for frimal and dual linear programming models. ม.ป.ท.:Chulalongkorn University, 2013. Print.