SYPAC: a pascal based computer algebra system for micro-computers. - Robert-Michel di Scala (SIGSAM Bull., 1982)

SYPAC : un système expérimental de calcul formel en Pascal. - Robert-Michel di Scala (1982)

Pascal as host language of computer algebra systems. - Jacques Calmet; Robert-Michel di Scala (ACM SIGPLAN Notices, 1983)