Interactive Balance Space Approach for Solving Bi-level Multi-Objective Programming Problems, a) The 31st International Conference for Statistics, Computer Science And its Applications, Benah, Egypt, 1-6 April, Vol. 2 pp. 1-20, (). b) Advances in Modelling and Analysis B, vol. 49, no. 3-4, pp. 43–62. Interactive Balance Space Approach for Solving Multi-Level Multi-Objective Programming Problems, a) Interactive balance space approach for solving multi-level multi-objective programming problems, Mahmoud A. Abo-Sinna and Ibrahim A. Baky Information Sciences, vol. 177, no. 16, pp. 3397–3410. b) Eighth International Conference on Parametric Optimization And Related Topics, Cairo, Egypt, November 27- December 1, (2005). A Comparison of Two Bi-Level programming Methods in Multi-Objective Programming Problems Applied To the Supply-Demand Interactions in Electronic Commerce, Scientific Bulletin, Ain Shams University, Faculty of Engineering, Vol. 40 No.4, pp. 1189-1213, (). Solving multi-level multi-objective linear programming problems through fuzzy goal programming approach, Applied Mathematical Modelling, vol. null, no. null, pp. null. Fuzzy goal programming algorithm for solving decentralized bi-level multi-objective programming problems,Fuzzy Sets and Systems, vol. 160, no. 18, pp. 2701–2713. Ibrahim A. Baky, Interactive TOPSIS algorithms for solving multi-level non-linear multi-objective decision-making problems, Applied Mathematical Modelling, In Press, Accepted Manuscript, Available online 22 August (2013). (Elsevier) Ibrahim A. Baky, Mohamed H. Eid , and Mohamed A. El Sayed, Bi-level Multi-objective Programming Problem with Fuzzy Demands: A Fuzzy Goal Programming Algorithm, Journal of Operational Research Society of India (OPSEARCH), DIO: 10.1007/s 12597- 013- 0145-2, (2014). (Springer) Ibrahim A. Baky and M. A. Abo-Sinna, TOPSIS for Bi-Level MODM Problems, Applied Mathematical Modelling, 37, 1004–1015, (2013). (Elsevier) Mahmoud A. Abo-Sinna and Ibrahim A. Baky, Fuzzy Goal Programming Procedure to Bilevel Multiobjective Linear Fractional Programming Problems, I-, Volume 2010, Article ID 148975, 15 pages, doi:10.1155/2010/148975, (2010).