Two-Level Domain Decomposition Methods for Highly Heterogeneous Darcy Equations. Connections with Multiscale MethodsVictorita Dolean, Pierre Jolivet, Frédéric Nataf, Nicole Spillane and Hua XiangOil Gas Sci. Technol. – Rev. IFP Energies nouvelles, 69 4 (2014) 731-752DOI: https://doi.org/10.2516/ogst/2013206