HRČKA, Richard - LAGAŇA, Rastislav. Wood cup description. In Economic and technical aspects of quality control for wood and wood products : COST E 53 Quality control for wood and wood products, Lisbon, Portugal, 22nd and 23rd October 2009. - Lisbon : [s. n.], 2009. ISBN 978-989-96428-1-2, [7] p. APVV-0282-06. Dostupné na internete: <http://www.coste53.net/downloads/Lisbon/Lisbon-presentation/COSTE53-ConferenceLisbon-Presentation-Hrcka.pdf>