List of Articles Open Access Article Abstract Page Full-Text 1 - A method for solving fully fuzzy linear system with trapezoidal fuzzy numbers A. Kumar A. Bansal A. Neetu https://doi.org/10.82521/IJO.2012.1018936 Open Access Article Abstract Page Full-Text 2 - Performance Evaluation of Banks Using DEA (Case study: Guilan Saderat Bank Branches) K. Shahroudi Sh. Assimi https://doi.org/10.82521/IJO.2012.1018937 Open Access Article Abstract Page Full-Text 3 - Inverse DEA Model with Fuzzy Data for Output Estimation A. Mahmoodi Rad R. Dehghan F. Hosseinzadeh Lotfi https://doi.org/10.82521/IJO.2012.1018938 Open Access Article Abstract Page Full-Text 4 - Improving supply chain collaborations and performance of inefficient supply chain M. Sanei S. Mamizadeh-Chatghayeh https://doi.org/10.82521/IJO.2012.1018939