@InProceedings{l95-p99-111, AUTHOR = {Stephen~L. Bloom and Zolt\'an \'Esik}, TITLE = {Free Shuffle Algebras in Language Varieties}, YEAR = 1995, BOOKTITLE = {Proc.~of the 2nd Latin American Symposium on Theoretical Informatics (LATIN'95)}, ADDRESS = {Valparaiso, Chile}, PAGES = {99--111}, KEYWORDS = {}}