Sursa:

Psotka J. – Papáč V. (2021). Polnočná jaskyňa (Peştera de la miezul nopţii) – nový objav v pohorí Bihor (Rumunsko). Spravodaj SSS, 52, 4, 5-10.

Psotka J. – Papáč V. (2022). Five years of exploration by Slovak cavers in The Băița karst area (Bihor Mts., Romania). Bulletin of the Slovak Speleological Society issued for the purpose of the 18th International Congress of Speleology - UIS, Savoie 2022. 71-77.