T-matrix formulation of real-space dynamical mean-field theory and the Friedel sum rule for correlated lattice fermionsKrzysztof Byczuk, Banhi Chatterjee and Dieter VollhardtEur. Phys. J. B, 92 2 (2019) 23DOI: https://doi.org/10.1140/epjb/e2018-90583-8