Clemmensen, Geert B. (January 1986). "Retargeting and rehosting the DDC Ada compiler system: A case study – the Honeywell DPS 6". ACM SIGAda Ada Letters. 6 (1): 22–28. doi:10.1145/382256.382794. S2CID16337448.
Clemmensen, Geert B. (January 1986). "Retargeting and rehosting the DDC Ada compiler system: A case study – the Honeywell DPS 6". ACM SIGAda Ada Letters. 6 (1): 22–28. doi:10.1145/382256.382794. S2CID16337448.
springer.com
link.springer.com
Some idea of that work, including a technical report TR 25.139 on "A Formal Definition of a PL/1 Subset", dated 20 December 1974, is reprinted in Jones 1984, p.107-155. Of particular note is the list of authors in order: H. Bekič, D. Bjørner, W. Henhapl, C. B. Jones, P. Lucas.