Green supplier selection based on IFS and GRA. - Özkan Bali; Erkan Kose; Serkan Gumus (Grey Syst. Theory Appl., 2013)

Developing an early warning system to predict currency crises. - Cuneyt Sevim; Asil Oztekin; Özkan Bali; Serkan Gumus; Erkam Güresen (Eur. J. Oper. Res., 2014)

Multi-terms MADM procedures with GRA and TOPSIS based on IFS and IVIFS. - Özkan Bali; Serkan Gumus (Grey Syst. Theory Appl., 2014)

An integrated dynamic intuitionistic fuzzy MADM approach for personnel promotion problem. - Özkan Bali; Metin Dagdeviren; Serkan Gumus (Kybernetes, 2015)

A Multi-Period Decision Making Procedure Based on Intuitionistic Fuzzy Sets for Selection Among Third-Party Logistics Providers. - Özkan Bali; Serkan Gumus; Ihsan Kaya (J. Multiple Valued Log. Soft Comput., 2015)

Fuzzy Similarity Approach to Air/Missile Defense Units Allocation in Area of Operation. - Kerim Goztepe; Ercan Karaman; Özkan Bali (J. Multiple Valued Log. Soft Comput., 2016)

Balancing stochastic U-lines using particle swarm optimization. - Emel Kizilkaya Aydogan; Yilmaz Delice; Ugur Özcan; Cevriye Gencer; Özkan Bali (J. Intell. Manuf., 2019)