* Seaton, Albert, The fall of Fortress Europe 1943-1945, B.T.Batsford Ltd., London, 1981 ISBN 0-7134-1968-7* Dupuy, Ernest R., and Trevor N. Dupuy, "The encyclopedia of Military History from 3500 B.C.
*Seaton, Albert, The fall of Fortress Europe 1943–1945, B.T.Batsford Ltd., London, 1981 ISBN 0-7134-1968-7*Dupuy, Ernest R., and Dupuy, Trevor N., "The encyclopedia of Military History from 3500 B.C.