Hennig-Roleff, Werner (1993-02-01) [1988]. "HEX.DOC: Motorola - HEX Format". SIM51. 1.04 (in German). Archived from the original on 2017-08-11. Retrieved 2021-12-08. (NB. This is an older version of SIM51, the software and documentation was maintained up to 1996.)
Hennig-Roleff, Werner (1993-02-01) [1988]. "HEX.DOC: Motorola - HEX Format". SIM51. 1.04 (in German). Archived from the original on 2017-08-11. Retrieved 2021-12-08. (NB. This is an older version of SIM51, the software and documentation was maintained up to 1996.)