Investigation of Massive MIMO Scenarios Involving Rooftop Propagation by Bidirectional Ray-Tracing.Published in:Progress in Electromagnetics Research C, 2019, v. 91, p. 129, doi. 10.2528/pierc18122703By:Taygur, Mehmet M.;Sukharevsky, Ilya O.;Eibert, Thomas F.Publication type:Article