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[28] M. SCHNEIDER, B. FLEMISCH, R. HELMIG, K. TEREKHOV, AND H. TCHELEPI, *Monotone nonlinear finite-volume method for challenging grids*, Computational Geosciences, 22 (2018), pp. 565-586, https://doi.org/10.1007/s10596-017-9710-8.

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