ISBN 1-86207-581-6 (hardcover); ISBN 1-86207-552-2 (paperback, 2003)*Eric Frattini (2011): "El Oro de Mefisto" Madrid, Espasa Calpe.
ISBN 1-86207-581-6 (hardcover); ISBN 1-86207-552-2 (paperback, 2003)* Infield, Glenn (1981) "Secrets of the SS.