Katz, J. & Aakhus, M. (Eds.). (2004). 絶え間なき交信の時代―ケータイ文化の誕生 ( Taemanaki kooshin no jidai: keetai bunka no tanjoo/The age of perpetual contact: The birth of mobile culture). Tokyo: NTT出 版. (Translation and Republication in Japanese).