“Frequency Transducer of Gas Concentration on the Basis of Two Bipolar Transistors With Active Inductive Element”. Visnyk of Vinnytsia Politechnical Institute, no. 2 (November 12, 2010): 86–90. Accessed October 10, 2026. https://visnyk.vntu.edu.ua/index.php/visnyk/article/view/168.