id: 70635326 dt: a an: 70635326 au: Badescu, Alina; Marcu, Ioana-Manuela; Petrescu, Teodor; Halunga, Simona; Fratu, Octavian ti: Facilities of digital modulation techniques and conversion schemes in underground multiuser systems so: EUROCON, 1-4 (2011). py: 2011 pu: la: EN cc: ut: ci: li: doi:10.1109/EUROCON.2011.5929281