Siermontowski, P.; Kobos, Z.; Olszański, R.; Pedrycz, A.; Koktysz, R.; Dąbrowiecki, Z.; Zając, G. Assessment on the Impact of Hyperbaric Environment – Nitrogen Narcosis on Brain Functions and Perception During Air Saturation by Use of Arithmetic Test. Curr Probl Psychiatry 2011, 12 (2), 137-140.