Stoyanov, Stoyan Nedelchev, Veselin Mihaylov, Zdravko Ivanov, and Radostin Radev. 2021. “System for Studying the Parameters of Gas Solenoid Valves”. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA 5 (2):112-21. https://doi.org/10.29114/ajtuv.vol5.iss2.259.