1.		Tourism, risk tolerance and competences: Travel organization and tourism hazards / Allan M. Williams, Vladimír Baláž Autor: Williams, Allan M. Coautor: ; Baláz, Vladimír
2.		Tourism risk and uncertainty: theoretical reflections / Allan M. Williams, Vladimír Baláž Autor: Williams, Allan M. Coautor: ; Baláz, Vladimír