Liu, Wei, and Jintao Cui. 2016. “Anisotropic Quasi-Wilson Element With Conforming Finite Element Approximation for Coupled Continuum Pipe-Flow/Darcy Model in Karst Aquifers”. Mathematical Modelling and Analysis 21 (4):431-49. https://doi.org/10.3846/13926292.2016.1175388.