Management challenges in the 21st century transport and logistics: opportunity for Slovakia in the era of knowledge economy : conference proceedings : Bratislava, april 19, 2011 - Ferenčíková, Soňa, 1960-; Hansenová, Heda; Hvorecký, Jozef; Sipko, Juraj; Šestáková, Monika; Šimúth, Jozef; Hontyová, Kajetána; Pokrivčák, Ján (School of Management / Vysoká škola manažmentu v Trenčíne, 2011)