Media type: E-Article Title: Function classes and relational constraints stable under compositions with cloness Contributor: Couceiro, Miguel; Foldes, Stephan imprint: University of Zielona Góra, Poland, 2009 Published in: Discussiones Mathematicae - General Algebra and Applications Language: English DOI: 10.7151/dmgaa.1153 ISSN: 1509-9415; 2084-0373 Keywords: Applied Mathematics ; Algebra and Number Theory Origination: Footnote: Access State: Open Access