Stoyanov S, Mihaylov V, Ivanov Z, Radev R. System for studying the parameters of gas solenoid valves [Internet]. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA [Internet]. 30Dec.2021 [cited 20Aug.2025];5(2):112-21. Available from: http://194.141.24.9/index.php/ajtuv/article/view/259