Final report (Archive) Swiss Federal Department of Transport and Power - Translated by the Department of Trade (United Kingdom) Accidents Investigation Branch. p. 3. Accesso 12 maggio 2012. "Accidents Investigation Branch Department of Trade Shell Mex House Strand, London WC2R 0DP"
Final report (Archive) Swiss Federal Department of Transport and Power - Translated by the Department of Trade (United Kingdom) Accidents Investigation Branch. p. 3. Accesso 12 maggio 2012. "Accidents Investigation Branch Department of Trade Shell Mex House Strand, London WC2R 0DP"