Carotenuto, Riccardo; Merenda, Massimo; Iero, Demetrio; Della Corte, Francesco G. (July 2019). "An Indoor Ultrasonic System for Autonomous 3-D Positioning". IEEE Transactions on Instrumentation and Measurement. 68 (7): 2507—2518. Bibcode:2019ITIM...68.2507C. doi:10.1109/TIM.2018.2866358. S2CID116511976.
Srivastav, A.; Bhogi, K.; Mandal, S.; Sharad, M. (Aug 2019). "An Adaptive Low-Complexity Abnormality Detection Scheme for Wearable Ultrasonography". IEEE Transactions on Circuits and Systems. 66 (8): 1466—1470. doi:10.1109/TCSII.2018.2881612. S2CID117391787.
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Carotenuto, Riccardo; Merenda, Massimo; Iero, Demetrio; Della Corte, Francesco G. (July 2019). "An Indoor Ultrasonic System for Autonomous 3-D Positioning". IEEE Transactions on Instrumentation and Measurement. 68 (7): 2507—2518. Bibcode:2019ITIM...68.2507C. doi:10.1109/TIM.2018.2866358. S2CID116511976.
Echo Sounding / Early Sound Methods (неопр.). National Oceanic & Atmospheric Administration (NOAA). NOAA Central Library (2006). — «In answer to the need for a more accurate depth registering device, Dr. Herbert Grove Dorsey, who later joined the C&GS, devised a visual indicating device for measuring relatively short time intervals and by which shoal and deep depths could be registered. In 1925, the C&GS obtained the very first Fathometer, designed and built by the Submarine Signal Company.» Дата обращения: 8 февраля 2024. Архивировано 14 сентября 2018 года.
Carotenuto, Riccardo; Merenda, Massimo; Iero, Demetrio; Della Corte, Francesco G. (July 2019). "An Indoor Ultrasonic System for Autonomous 3-D Positioning". IEEE Transactions on Instrumentation and Measurement. 68 (7): 2507—2518. Bibcode:2019ITIM...68.2507C. doi:10.1109/TIM.2018.2866358. S2CID116511976.
Echo Sounding / Early Sound Methods (неопр.). National Oceanic & Atmospheric Administration (NOAA). NOAA Central Library (2006). — «In answer to the need for a more accurate depth registering device, Dr. Herbert Grove Dorsey, who later joined the C&GS, devised a visual indicating device for measuring relatively short time intervals and by which shoal and deep depths could be registered. In 1925, the C&GS obtained the very first Fathometer, designed and built by the Submarine Signal Company.» Дата обращения: 8 февраля 2024. Архивировано 14 сентября 2018 года.