The Prisoner Vanishes (sources)
- Among the Missing, by Jay Robert Nash, 1978. Pgs. 331,357. Online at: https://books.google.com/books?id=SjohCgAAQBAJ&pg=PA331&dq=diderici+weichselmunde&hl=en&sa=X&ved=0CCgQ6AEwAmoVChMIrre0n4WCxwIVkn6ICh3R9Qzg#v=onepage&q=diderici%20weichselmunde&f=false
- "Chapter XV: An Old Soldier's Story," chapter in Historic Bye-Ways, Vol. 2, by Sir Lascelles Wraxall, 1864 London, England. Pgs. 320-338. Online at: https://books.google.com/books?id=n_ENAAAAYAAJ&pg=PA337&lpg=PA337&dq=diderici+alswanger&source=bl&ots=T4mv_LIjyK&sig=HkXdbw_J8id8zOxI6vR7WqNX4jA&hl=en&sa=X&ved=0CCsQ6AEwBGoVChMIk6zcnoyCxwIVgTGICh19NQKd#v=onepage&q=diderici%20alswanger&f=false
Mentions & Repeaters
- Mysteries of the Unexplained, 1982 Reader's Digest Association, USA. Fifth printing, February 1985. ISBN: 0-89577-146-2. Pg. 118