Validity of spatial covariance matrices over time and frequency. - Ingo Viering; Helmut Hofstetter; Wolfgang Utschick (GLOBECOM, 2002)

Car-to-car radio channel measurements at 5 GHz: Pathloss, power-delay profile, and delay-Doppler spectrum. - Alexander Paier; Johan Karedal; Nicolai Czink; Helmut Hofstetter; Charlotte Dumard; Thomas Zemen; Fredrik Tufvesson; Andreas F. Molisch; Christoph F. Mecklenbräuker (ISWCS, 2007)

First Results from Car-to-Car and Car-to-Infrastructure Radio Channel Measurements at 5.2GHZ. - Alexander Paier; Johan Karedal; Nicolai Czink; Helmut Hofstetter; Charlotte Dumard; Thomas Zemen; Fredrik Tufvesson; Christoph F. Mecklenbräuker; Andreas F. Molisch (PIMRC, 2007)

Survey of Channel and Radio Propagation Models for Wireless MIMO Systems. - Peter Almers; Ernst Bonek; Alister G. Burr; Nicolai Czink; Mérouane Debbah; Vittorio Degli-Esposti; Helmut Hofstetter; Pekka Kyösti; David I. Laurenson; Gerald Matz; Andreas F. Molisch; Claude Oestges; et al. (EURASIP J. Wirel. Commun. Netw., 2007)