List of Articles Open Access Article Abstract Page Full-Text 1 - The interval Malmquist productivity index in DEA F. Rezai Balf F. Hosseinzadeh Lotfi M. Alizadeh Afrouzi Open Access Article Abstract Page Full-Text 2 - Portfolio Selection using Data Envelopment Analysis with common weights A. Alinezhad M. Zohrebandian F. Dehdar Open Access Article Abstract Page Full-Text 3 - Some Results on facets for linear inequality in 0-1 variables D. Sashi Bhusan B. Bagaban J.P. Tripathy Open Access Article Abstract Page Full-Text 4 - The cost and income efficiency models with MOLP structure G.R. Jahanshahloo M. R. Mozaffari Z. Sobhan