Issue No.05 - May (1974 vol.23)
J.M. Hart , Department of Computer Science, University of Kentucky
The local adjunct languages (LAL's) and grammars have been defined so as to characterize many aspects of natural and programming languages.
Context-free languages (CFL's), Kleene star, local adjunct languages (LAL's), push-down automata (pda's), recursive generation of languages, regional adjunct languages (RAL's), regular languages.
J.M. Hart, "A Class of Push-Down Acceptors for Adjunct Languages", IEEE Transactions on Computers, vol.23, no. 5, pp. 449-455, May 1974, doi:10.1109/T-C.1974.223966