Integration between terrestrial and satellite networks: the PPDR-TC vision. - Carlo Augusto Grazia; Martin Klapez; Natale Patriciello; Maurizio Casoni; Angelos Amditis; Evangelos Sdongos; Henryk Gierszal; Dimitris Kanakidis; Christos I. Katsigiannis; Krzysztof Romanowski; Pedro Simplicio; André Oliveira; et al. (WiMob, 2014)