Author’s Accepted Manuscript A multi-criteria approach to selecting an optimal portfolio of refinery upgrade projects under margin and tax regime uncertainty Vladimir Korotin, Popov Victor, Tolokonsky Andrey, Rustam Islamov, Arseniy Ulchenkov PII: S0305-0483(16)30089-5 DOI: http://dx.doi.org/10.1016/j.omega.2016.11.003 Reference: OME1727 To appear in: Omega Received date: 4 April 2016 Revised date: 27 September 2016 Accepted date: 8 November 2016 Cite this article as: Vladimir Korotin, Popov Victor, Tolokonsky Andrey, Rustam Islamov and Arseniy Ulchenkov, A multi-criteria approach to selecting an optimal portfolio of refinery upgrade projects under margin and tax regime uncertainty, Omega, http://dx.doi.org/10.1016/j.omega.2016.11.003 This is a PDF file of an unedited manuscript that has been accepted fo publication. As a service to our customers we are providing this early version o the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain www.elsevier.com/locate/omega