Edwards, M. G., Friis, H. A., & Mykkeltveit, J. (2009). Symmetric Positive Definite Flux-Continuous Full-Tensor Finite-Volume Schemes on Unstructured Cell-Centered Triangular Grids. SIAM Journal on Scientific Computing, 31(2), pp. 1192-1220. doi:10.1137/070692182

Edwards, Michael G., Helmer André Friis, and Johannes Mykkeltveit. "Symmetric Positive Definite Flux-Continuous Full-Tensor Finite-Volume Schemes On Unstructured Cell-Centered Triangular Grids." SIAM Journal On Scientific Computing 31, no. 2 (2009): 1192-1220.

Edwards, Michael G., Helmer André Friis, and Johannes Mykkeltveit. "Symmetric Positive Definite Flux-Continuous Full-Tensor Finite-Volume Schemes On Unstructured Cell-Centered Triangular Grids." SIAM Journal On Scientific Computing 31.2 (2009): 1192-1220.