Automatic Train Operation on London Transport Railways

“Automatic Driving of Electric Trains.” Dell R. Manser A. W. . Electronics and Power, April 1964.

“Automatic Driving of Passenger Trains on London Transport.” Dell R. Manser A. W. . Proceedings of Convention on Automatic Railways, Institution of Mechanical Engineers, 1964.

Presidential Address, 1966. Dell R. , Institution of Railway Signal Engineers.

“Development of Automatic Train Operation on London Transport.” Duckitt H. Kent G. R. . Proceedings of the Institution of Railway Signal Engineers.