Gomez Lende, Manuel, et al. “Morphology, Ice Types and Thermal Regime in a High Mountain Ice Cave. First Studies Applying Terrestrial Laser Scanner in the Peña Castil Ice Cave (Picos De Europa, Northern Spain)”. Geografia Fisica E Dinamica Quaternaria, vol. 37, no. 2, Dec. 2014, pp. 141-50, https://doi.org/10.4461/GFDQ.2014.37.13.