List of Articles Buy Back Open Access Article Abstract Page Full-Text 1 - A Study of the Concept and Special Rulings of "Composite and Comprehensive Contracts" in Iranian Jurisprudence and Law with a Comparative Perspective Seyyed Mohammad Taghi karimpoor Alehashem 10.22034/ijrj.2022.691897 Open Access Article Abstract Page Full-Text 2 - Comparison Research on Buy- back and Production Sharing Contracts in Upstream projects of Oil and Gas Industry of Iran Hooshang Momeni Vesalian Hojatolla Ghanimi Fard Mohammad Mahmuodi