Media type: E-Article Title: Rank gradient, cost of groups and the rank versus Heegaard genus problem Contributor: Abért, Miklós; Nikolov, Nikolay Published: European Mathematical Society - EMS - Publishing House GmbH, 2012 Published in: Journal of the European Mathematical Society, 14 (2012) 5, Seite 1657-1677 Language: Not determined DOI: 10.4171/jems/344 ISSN: 1435-9855; 1435-9863 Keywords: Applied Mathematics ; General Mathematics Origination: Footnote: