The semantics of a mathematically oriented computer language. - Gerhard Kratky; Hermann Kopetz (ACM National Conference, 1969)

AMTRAN: an interactive computing system. - Juris Reinfelds; Niels Eskelson; Hermann Kopetz; Gerhard Kratky (AFIPS Spring Joint Computing Conference, 1970)

The definition of AMTRAN. - Gerhard Kratky (ACM SIGPLAN Notices, 1971)