Emanuel A. Schegloff. "On 'Opening Seqencing': A framing statement." In J.E. Katz and M. Aakhus (eds.), Perpetual Contact: Mobile communication, private talk, public performance. (Cambridge: Cambridge University Press, 2002), 321-25. and Emanuel A. Schegloff. "Opening Seqencing." In J.E. Katz and M. Aakhus (eds.), Perpetual Contact: Mobile communication, private talk, public performance. (Cambridge: Cambridge University Press, 2002), 326-85.