Shahraki, Z., M. Allahdadi, and H. Mishmast Nehi. “Fuzzy Multi Objective Linear Programming Problem With Imprecise Aspiration Level and Parameters”. An International Journal of Optimization and Control: Theories & Applications (IJOCTA), vol. 5, no. 2, June 2015, pp. 81-86, doi:10.11121/ijocta.01.2015.00210.