A New Algorithm for Multilevel Optimization Problems Using Evolutionary Strategy, Inspired by Natural Adaptation. - Surafel Luleseged Tilahun; Semu Mitiku Kassa; Hong Choon Ong (PRICAI, 2012)

Systematic evolutionary algorithm for general multilevel Stackelberg problems with bounded decision variables (SEAMSP). - Ashenafi Teklay Woldemariam; Semu Mitiku Kassa (Ann. Oper. Res., 2015)

A branch-and-bound multi-parametric programming approach for non-convex multilevel optimization with polyhedral constraints. - Abay Molla Kassa; Semu Mitiku Kassa (J. Glob. Optim., 2016)

Deterministic solution approach for some classes of nonlinear multilevel programs with multiple followers. - Abay Molla Kassa; Semu Mitiku Kassa (J. Glob. Optim., 2017)

A Method for Solving Some Class of Multilevel Multi-leader Multi-follower Programming Problems. - Addis Belete Zewde; Semu Mitiku Kassa (WCGO, 2019)

A systematic sampling evolutionary (SSE) method for stochastic bilevel programming problems. - Natnael Nigussie Goshu; Semu Mitiku Kassa (Comput. Oper. Res., 2020)

Multilevel multi-leader multiple-follower games with nonseparable objectives and shared constraints. - Addis Belete Zewde; Semu Mitiku Kassa (Comput. Manag. Sci., 2021)

Hierarchical multilevel optimization with multiple-leaders multiple-followers setting and nonseparable objectives. - Addis Belete Zewde; Semu Mitiku Kassa (RAIRO Oper. Res., 2021)

Branch-and-cut solution approach for multilevel mixed integer linear programming problems. - Ashenafi Awraris; Berhanu Guta Wordofa; Semu Mitiku Kassa (EURO J. Comput. Optim., 2023)

A novel approach for solving multi-parametric problems with nonlinear constraints. - Addis Belete Zewde; Semu Mitiku Kassa (J. Glob. Optim., 2023)

Multilevel Reverse Stackelberg Differential Games: Existence and Solution Approach for Affine Strategies. - Seyfe Belete Worku; Birilew Belayneh Tsegaw; Semu Mitiku Kassa (J. Optim. Theory Appl., 2023)

Effect of cross-border migration on the healthcare system of a destination community: Insights from mathematical modelling of COVID-19 in a developing country. - Y. A. Terefe; John Boscoh H. Njagarah; Semu Mitiku Kassa (Math. Comput. Simul., 2023)

Existence and computations of best affine strategies for multilevel reverse Stackelberg games. - Seyfe Belete Worku; Birilew Belayneh Tsegaw; Semu Mitiku Kassa (Math. Methods Oper. Res., 2023)

A solution method for stochastic multilevel programming problems. A systematic sampling evolutionary approach. - Natnael Nigussie Goshu; Semu Mitiku Kassa (Oper. Res. Decis., 2024)