@article{weko_7984_1, author = "Hara,Kazuyuki and Nakayama,Kenji", title = "Multi-frequency signal classification by multilayer neural networks and linear filter methods", journal = "IEICE transactions on fundamentals of electronics, communications and computer sciences", year = "1997", volume = "E80-A", number = "5", pages = "894--902", month = "may" }