The role of (personal) network effects and switching costs in determining mobile user's choice / Juan Pablo Maicas, Yolanda Polo, Francisco Javier Sese
Dynamic competition with switching costs / Joseph Farrell and Carl Shapiro
Seeds of disaster, roots of response : how private action can reduce public vulnerability / ed. by Philip E. Auerswald...[et al.]
História das telecomunicações em Portugal : da Direcção-Geral dos Telégrafos do Reino à Portugal Telecom / Maria Fernanda Rollo