A Comparison of Digital Subscriber Line Transmission Systems Employing Different Line Codes. - Alberto Brosio; Umberto De Julio; Vincenzo Lazzari; Renzo Ravaglia; Adler Tofanelli (IEEE Trans. Commun., 1981)

Comparison of two speech codecs for DMR systems. - Vincenzo Lazzari; Roberto Montagna; Daniele Sereno (Speech Commun., 1988)