@ARTICLE {, title = {Poznámka o Vennových diagramoch}, author = {Doboš, Jozef}, journal = {Obzory matematiky, fyziky a informatiky}, year = {2015}, volume = {44}, number = {4}, pages = {1--6}, issn = {1335-4981}, abstract = {The purpose of this paper is to present an interesting proof technique of set identities by Venn diagrams, namely “Proving Set Identities with One Example”, which is quite rarely found in textbooks.}, }