Character Alignment for High-Capacity PCM Systems Using MS43 Line Code. - Odoardo Brugia; Maurizio Dècina; Umberto De Julio (IEEE Trans. Commun., 1975)

An Experimental System for Hybrid Digital Transmission at 140 Mbits/s on Coaxial Cables. - Umberto De Julio; Bruno Fabbri; Luigi Sacchi; Federico Tosco; Giancarlo Veglio (IEEE Trans. Commun., 1976)

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)

Layer 1 ISDN Recommendations. - Umberto De Julio; Giorgio Pellegrini (IEEE J. Sel. Areas Commun., 1986)