 Studies in Abstract Families of Languages by Seymour Ginsburg and others (source code)

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= Studies in Abstract Families of Languages by Seymour Ginsburg and others
{c}
{tag=Work by Seymour Ginsburg}
{tag=Work by Sheila A. Greibach}
{tag=Work by John E. Hopcroft}
{title2=1969}

https://doi.org/10.1090/memo/0087

Memoirs of the American Mathematical Society87. The first paper, Abstract families of languages, printed pp.1–32, introduces the closure-axiom framework.

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