@inproceedings{Nobukawa:20167D, author = "Nobukawa, Masayoshi and Nobukawa, Kumiko K.", title = "{The Galactic Ridge X-ray Emission: the 6.4 keV Line }", doi = "10.22323/1.246.0028", booktitle = "Proceedings of XI Multifrequency Behaviour of High Energy Cosmic Sources Workshop {\textemdash} PoS(MULTIF15)", year = 2016, volume = "246", pages = "028" }