Qualität im Internet. - Walter Brenner; Rüdiger Zarnekow; Jörn Kruse; Andreas Sidler (Elektrotech. Informationstechnik, 2008)

Calling party pays or receiving party pays? The diffusion of mobile telephony with endogenous regulation. - Ralf Dewenter; Jörn Kruse (Inf. Econ. Policy, 2011)