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• Расчет частотных характеристик стола круглошлифовательного станкаGrossschmidt, Gunnar; Sakarias, A.Сборник статей по машиностроению. 121975 / с. 43-54 : илл https://www.ester.ee/record=b2190717*est https://digikogu.taltech.ee/et/Item/7b7310bb-55bb-4584-a47b-63fe4d08b6a9
• Регулирование производительности индукционных насосов путем изменения частоты и напряженияIrs, Rein; Külm, Evald; Tiismus, HugoИсследование и проектирование электромагнитных средств перемещения жидких металлов : сборник трудов. 101973 / с. 67-82 : илл https://www.ester.ee/record=b2100340*est https://digikogu.taltech.ee/et/Item/3679d56d-2e5b-40d9-8ecf-23936b94edb5
• Совмещенный анализ чувствительностей, шумов и нелинейных искажений в частотной областиLaksberg, EdgarИзвестия высших учебных заведений. Радиоэлектроника : Ежемесячный научно-технический журнал1982 / с. 45-51
• Способ измерения малых разностей частот. Авторское свидетельство № 359606Korsen, Viljo; Pikkov, Otto; Järvalt, AldurОткрытия, изобретения, промышленные образцы, товарные знаки : официальный бюллетень Комитета по делам изобретений и открытий при Совете Министров СССР1973 / с. [?] https://www.ester.ee/record=b2319409*est https://patentdb.ru/patent/359606
• Стабилизация мощности высокочастотного лампового генератораTarma, MatiТруды по электротехнике и автоматике : сборник статей. 51967 / с. 67-77 : илл https://www.ester.ee/record=b2182187*est https://digikogu.taltech.ee/et/Item/a4d66fdf-69d6-487a-a6ee-1ffce266f2ad
• Структурно-корреляционные алгоритмы оценки частоты : (депонированная статья)Kangur, OlegТруды по радиотехнике : сборник статей. 11974 / с. 17-18 https://www.ester.ee/record=b2190658*est https://digikogu.taltech.ee/et/Item/5cef14c6-ad1c-48d0-970c-a5748f195738
• Частотные характеристики : таблицы, номограммы1971 https://www.ester.ee/record=b1369879*est
• Четырехполосные модели элементов гидравлических трасс гидроприводов для расчета частотных характеристикGrossschmidt, GunnarНеустановившееся движение жидкости в трубах1980 / с. 41-50 : илл https://www.ester.ee/record=b1263941*est https://digikogu.taltech.ee/et/Item/aeac2da9-cb51-4746-9dc3-c435104586eb