ISMEAL, Z. Y.; SALLOOM, M. Y. A Comparison of the Performance Characteristics of Conventional and Proportional Valves Applied for Synchronizing Hydraulic Cylinders. Engineering, Technology & Applied Science Research, Greece, v. 15, n. 4, p. 24912–24923, 2025. DOI: 10.48084/etasr.11347. Disponível em: https://etasr.com/index.php/ETASR/article/view/11347. Acesso em: 13 may. 2026.