M. Köppel, I. Kröker, and C. Rohde. Finite volumes for complex applications VII : methods and theoretical aspects, 77, page 353-361. Cham, Springer, (2014)
A. Barth, and A. Stein. Stochastics and Partial Differential Equations : Analysis and Computations, 6 (2):
286-334(2018)Preprint: https://arxiv.org/abs/1612.05541.