A Helly theorem in metric spaces and majored operations

DUCHOŇ, Miloslav - MALIČKÝ, Peter. A Helly theorem in metric spaces and majored operations. In Tatra Mountains Mathematical Publications. - Bratislava : Slovenská akadémia vied, 2010. ISSN 1210-3195, 2010, roč. 46, č. 2, s. 111-123.