4Peter N Johnstona, Mikael Huh, Joel Gasparro, et al. The distribution of ^210Pb in human bone and its impact on methods for the retrospective estimation of 222 Rn exposure from in vivo measurements [ J ]. Journal of Environmental Radioactivity. 2005, 80:245 - 257.
5Haninger T, Wahl W , Salonen L, et al. In vivo measurements on the human skull for retrospective assessment of individual intakes of natural radionuclides [ J ]. International Congress Series 1225. 2002:95 - 100.