1. Alvarez-Gallego, M., Garcia-Anton, E., Fernandez-Cortes, A., Cuezva, S., & Sanchez-Moral, S. (2015). High radon levels in subterranean environments: monitoring and technical criteria to ensure human safety (case of Castañar cave, Spain). Journal of Environmental Radioactivity, 145, 19–29.
2. Balintoni, I. (1997). Geotectonica terenurilor metamorfice din Romania. Cluj-Napoca: Carpatica.
3. Bican-Brişan, N., Cosma, C., Cucoş, A., Burghele, B., Papp, B., Constantin, S., et al. (2016). Use of CR-39 solid state nuclear track detectors in assessment of the radon exposure in two limestone caves in Romania. Romanian Journal of Physics, 61 (5–6), in press.
4. Bican-Brişan, N., Cucoş Dinu, A., Petrea, D., & Mera, O. (2013). Monitoring of radon levels in some touristic underground environments from Romania. Carpathian Journal of Earth and Environmental Sciences, 8(3), 67–74.
5. Bleahu, M., Decu, V., Negrea, Şt, Pleşa, C., Povară, I., & Viehmann, I. (1976). Peşteri din România. Bucureşti: Ştiinţifică şi Enciclopedică.