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  • Dotinga, Randy. "Sagging Radio Plays Digital Card." Wired, June 14, 2005.,1412,67821,00.html
  • Ferency-Viars, Robert. "What You Need to Know about HD Radio." Crutchfield Advisor.
  • Junko, Yoshida. "Last-Minute Changes Blur U.S. Digital Radio Spec." TechWeb, August 15, 2003.
  • Nave, Rod. "Broadcast Signals."
  • Shapiro, Leslie. "Review of the Panasonic CQ-CB9900U HD Radio Receiver." Crutchfield Advisor, November 30, 2004.