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)

Goal programming approaches for data envelopment analysis cross efficiency evaluation. - H. Hasan Örkcü; Hasan Bal (Appl. Math. Comput., 2011)

A new mathematical programming approach to multi-group classification problems. - Hasan Bal; H. Hasan Örkcü (Comput. Oper. Res., 2011)

Comparing performances of backpropagation and genetic algorithms in the data classification. - H. Hasan Örkcü; Hasan Bal (Expert Syst. Appl., 2011)

An Archimedean Copula Family with Hyperbolic Cotangent Generator. - Vadoud Najjari; Tomás Bacigál; Hasan Bal (Int. J. Uncertain. Fuzziness Knowl. Based Syst., 2014)

A modification of a mixed integer linear programming (MILP) model to avoid the computational complexity. - H. Hasan Örkcü; Mehmet Güray Ünsal; Hasan Bal (Ann. Oper. Res., 2015)

Additive generators of copulas. - Tomás Bacigál; Vadoud Najjari; Radko Mesiar; Hasan Bal (Fuzzy Sets Syst., 2015)

A neutral cross efficiency approach for basic two stage production systems. - H. Hasan Örkcü; Volkan Soner Özsoy; Mediha Örkcü; Hasan Bal (Expert Syst. Appl., 2019)