@article{weko_24654_1, author = "宮本,重徳 and 北本,俊二 and 満田,和久 and 堂谷,忠靖", title = "Delayed hard X-rays from Cygnus X-l", journal = "Nature", year = "1988", volume = "336", number = "6198", pages = "450--452", month = "dec" }