Yamamura, Sakae Spiral vector theory of AC circuits and machines / Sakae Yamamura - Oxford : Clarendon Press, 1985 - 131 p. : il.;, 23 cm. - Monographs in electrical, and electronic engineering ; 26 . Apéndice: p. 106 Index: p. 130 References: p. 128 Universal Decimal Class. No.: 621.313