CAI, Jiaze. A Fully Mechanical Realization of PID Controller. Highlights in Science, Engineering and Technology, [S. l.], v. 9, p. 319–328, 2022. DOI: 10.54097/hset.v9i.1861. Disponível em: https://drpress.org/ojs/index.php/HSET/article/view/1861. Acesso em: 17 aug. 2026.