@techreport{oai:repository.dl.itc.u-tokyo.ac.jp:00042993, author = {Narayana, Muttur Ranganathan}, month = {Mar}, note = {application/pdf, Revised in May 2008., 本文フィルはリンク先を参照のこと}, title = {Substituability between Mobile and Fixed Telephones: Evidence and Implications for India}, year = {2008} }