Edwards, M. G., & Zheng, H. (2010). Quasi-positive families of continuous Darcy-flux finite volume schemes on structured and unstructured grids. Journal of Computational and Applied Mathematics, 234(7), pp. 2152-2161. doi:10.1016/j.cam.2009.08.078

Edwards, Michael G., and Hongwen Zheng. "Quasi-positive Families of Continuous Darcy-flux Finite Volume Schemes On Structured and Unstructured Grids." Journal of Computational and Applied Mathematics 234, no. 7 (2010): 2152-2161.

Edwards, Michael G., and Hongwen Zheng. "Quasi-positive Families of Continuous Darcy-flux Finite Volume Schemes On Structured and Unstructured Grids." Journal of Computational and Applied Mathematics 234.7 (2010): 2152-2161.