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HLINĚNÝ, Petr. Approximating the Crossing Number for Graphs close to "Planarity". In Structure Theory and FPT Algorithmics for Graphs, Digraphs and Hypergraphs. Abstracts collection, Dagstuhl Seminar 07281. Dagstuhl, Germany: Schloss Dagstuhl GmbH, 2007, s. 6-7. ISSN 1862-4405.Podrobněji: https://is.muni.cz/publication/722829/cs