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Wihler, Thomas P.; Rivière, Béatrice (2011). Discountinuous Galerkin methods for second-order elliptic PDE with low-regularity solutions. Journal of scientific computing, 46(2), pp. 151-165. New York, N.Y.: Springer US; http://www.springer-ny.com 10.1007/s10915-010-9387-9
