Antovich, N., V. V. Uvarov, P. Vukotich, and S. Dapchevich. “Indoor Radon Concentrations above Bauxite Ground”. Geofisica Internacional, vol. 41, no. 3, July 2002, pp. 321-3, doi:10.22201/igeof.00167169p.2002.41.3.350.