Lima-Flores, A. ., R. . Palomino-Merino, E. . Espinosa, V. M. . Castano, E. . Merlo-Juarez, M. . Cruz-Sanchez, and G. . Espinosa. “The Indoor Radon Concentration Within the Tunnels of the Cholula Pyramid Through a Nuclear Tracks Methodology”. Journal of Nuclear Physics, Material Sciences, Radiation and Applications, vol. 4, no. 1, Aug. 2016, pp. 77-88, doi:10.15415/jnp.2016.41008.