| JAPANESE |
Downward Terrestrial Gamma-Ray Flash Observed in a Winter Thunderstorm
Wada, Y. and Enoto, T. and Nakazawa, K. and Furuta, Y. and Yuasa, T. and Nakamura, Y. and Morimoto, T. and Matsumoto, T. and Makishima, K. and Tsuchiya, H.
Phys. Rev. Lett. 123, 061103 – Published 7 August 2019
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.123.061103
(peer-reviewed)