Holý, Karol Outdoor Radon: Measurement, Variations and Applications. Bulko, Martin. Polášková, Anna. Holá, Oľga, 1947-. Mullerová, Monika In: 2007. -- 5th Conference on Protection Against Radon at Home and at Work, prague Czech Republic. -- s.65-66. -- 978-80-01-03783-6.