The Infostations challenge: balancing cost and ubiquity in delivering wireless data. - Richard H. Frenkiel; B. R. Badrinath; Joan Borràs; Roy D. Yates (IEEE Wirel. Commun., 2000)

Creating cellular: A history of the AMPS project (1971-1983) [History of Communications]. - Richard H. Frenkiel (IEEE Commun. Mag., 2010)