STOYANOV, Stoyan Nedelchev; MIHAYLOV, Veselin; IVANOV, Zdravko; RADEV, Radostin. System for studying the parameters of gas solenoid valves. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA, [S. l.], v. 5, n. 2, p. 112–121, 2021. DOI: 10.29114/ajtuv.vol5.iss2.259. Disponível em: https://aj.tu-varna.bg/index.php/ajtuv/article/view/259. Acesso em: 2 oct. 2025.