@article{oai:repository.dl.itc.u-tokyo.ac.jp:00000812,
 author = {Tsuchiya, H. and Enoto, T. and Yamada, S. and Yuasa, T. and Kawaharada, M. and Kitaguchi, T. and Kokubun, M. and Kato, H. and Okano, M. and Nakamura, S. and Makishima, K.},
 issue = {16},
 journal = {Physical review letters},
 month = {Oct},
 title = {Detection of High-Energy Gamma Rays from Winter Thunderclouds},
 volume = {99},
 year = {2007}
}