The Moscow Times - Business Review Events in telecommunication history Museums of St Petersburg and Leningrad region News On The Wire Gentlemen of the Cable Service P.L.Schilling, the Inventor of Electromagnetic Telegraph / an article in PCweek magazine (Russian) Article on Schilling's telegraph apparatus (Russian) Huurdeman, A.A., The worldwide history of telecommunications, Wiley-IEEE, 2003 ISBN 0-471-20505-2