Ferruccio Barsi Alan A. Bertossi Francesco Betti Sorbelli Roberto Ciotti Stephan Olariu Maria Cristina Pinotti Asynchronous Corona Training Protocols in Wireless Sensor and Actor Networks. 1216-1230 2009 20 IEEE Trans. Parallel Distrib. Syst. 8 http://dx.doi.org/10.1109/TPDS.2008.223 db/journals/tpds/tpds20.html#BarsiBSCOP09