@article{Hiyama2013, author = "Tetsuya Hiyama and Kazuyoshi Asai and Alexander B Kolesnikov and Leonid A Gagarin and Victor V Shepelev", title = "{Time series of the tritium concentration (TU) in precipitation (a) obtained at Tokyo and Tsukuba, Japan (Shimada et al 1994)}", year = "2013", month = "9", url = "https://iop.figshare.com/articles/figure/_Time_series_of_the_tritium_concentration_TU_in_precipitation_a_obtained_at_Tokyo_and_Tsukuba_Japan_/1011857", doi = "10.6084/m9.figshare.1011857.v1" }