1. Pareto optimality for bi-level programming problem with fuzzy parameters;Abo-Sinna;J. Operat. Res. Soc. of India (OPSEARCH),2001
2. Bi-level linear programming;Ayed;Comput. Operat. Res.,1993
3. Two level linear programming;Bialas;Manage. Sci.,1984
4. Fining an efficient solution to linear bi-level programming problem: an efficient approach;Pyng;J. Global Optim.,1996
5. A bi-level non-linear multi-objective decision making under fuzziness;Abo-Sinna;J. Operat. Res. Soc. of India (OPSEARCH),2001