* [http://CPCrulez.fr/Utils/index.php?download=Zn_F3tSmkLnU4peIVLHUsbOhbZvItJPUisI=&p=gsLl2M69gsbe29PNgMfp1dGHhn_l3tTGkLmj1NnH E-Prolog v2.3 on CPCRulez.]
* [https://webforum.archiveclassic-computing.orgde/webindex.php?attachment/20210731093512/http://microbee.uber48421-leet.comepro23-zip/microbee_mbug_disks/mbug114/EPRO.Z80 Source Assembler source code]
===Manual===