@article {Aces_Journal_2000, title = {Ray-tracing techniques for mobile communications}, journal = {Applied Computacional Electromagnetics Society (ACES) Journal}, volume = {15}, number = {3}, year = {2000}, month = {November}, pages = {209{\textendash}231}, author = {Guti{\'e}rrez, O. and Saez de Adana, F. and Gonz{\'a}lez, I. and P{\'e}rez, Jes{\'u}s and C{\'a}tedra, M. F.} }