DAWLETBAY ULI, Niyetbaev Arislanbek. Operational Indicators for Performance Optimization of Quarry Hydraulic Excavators. Spanish Journal of Innovation and Integrity, [S. l.], v. 40, p. 248–250, 2025. Disponível em: https://www.sjii.es/index.php/journal/article/view/350. Acesso em: 22 aug. 2025.