An experimental comparison of the new goal programming and the linear programming approaches in the two-group discriminant problems. - Hasan Bal; H. Hasan Örkcü; Salih Çelebioglu (Comput. Ind. Eng., 2006)

A new method based on the dispersion of weights in data envelopment analysis. - Hasan Bal; H. Hasan Örkcü; Salih Çelebioglu (Comput. Ind. Eng., 2008)

Improving the discrimination power and weights dispersion in the data envelopment analysis. - Hasan Bal; H. Hasan Örkcü; Salih Çelebioglu (Comput. Oper. Res., 2010)