Luciano Boquete I. Bravo Rafael Barea Miguel Angel García Telemetry and control system with GSM communications. 1-8 2003 27 Microprocessors and Microsystems 1 http://dx.doi.org/10.1016/S0141-9331(02)00080-7 db/journals/mam/mam27.html#BoqueteBBG03