@article{ Solr-acta12409, title = {Giving mathematical semantics of nondeterministic and parallel programming structures by means of attribute grammars}, series = {Acta cybernetica}, author = {Álvarez Gil R.}, year = {1986}, url = {http://acta.bibl.u-szeged.hu/12409/1/cybernetica_007_fasc_004_413-423.pdf} }