GAFAROV, G.A.; VALEHOV, S.E. Design of Stimulation Device of Biological Active Points using 555 Timer. Herald of Azerbaijan Engineering Academy, [S. l.], v. 13, n. 4, p. 113–120, 2021. DOI: 10.52171/2076-0515_2021_13_04_113_120. Disponível em: https://journal.ama.com.az/index.php/pub/article/view/60. Acesso em: 23 may. 2025.