(1) S. Isonaga, S. Hattori, M. Okamoto, and S. Tanaka: “Measurment of Water Level in a Monitoring System of a Bathroom”, IEEJ Trans. EIS, Vol. 124-C, No. 7, pp. 1462-1470 (2004-7) (in Japanese)
磯永 聡・服部哲・岡本昌幸・田中正吾:「浴室内監視システムにおける水位計測」,電学論,124, 7, pp. 1462-1470 (2004)
(2) S. Isonaga, S. Hattori, M. Okamoto, and S. Tanaka : “A Simple Measurement of Water Level of a Bath tub Using an Acoustic Sensor in a Monitoring System of a Bathroom”, Journal of The Society of Instrument and Control Engineers, Vol. 41, No. 1, pp. 16-24 (2005) (in Japanese)
(3) S. Isonaga and S. Tanaka: “Recognition of Sound Environment by a Preproposed Bathroom Monitoring System”, Journal of The Society of Instrument and Control Engineers, Vol. 41, No. 11, pp. 925-927 (2005) (in Japanese)