F. Acker. Frequency division: the Japanese electricity network. „IEE Review”. 41 (3), s. 101-103, 1995. DOI: 10.1049/ir:19950307. ISSN0953-5683. (ang.).
F. Acker. Frequency division: the Japanese electricity network. „IEE Review”. 41 (3), s. 101-103, 1995. DOI: 10.1049/ir:19950307. ISSN0953-5683. (ang.).