I. Perez-Alfaro, D. Gil Hernandez, J. C. Sanchez Catalán, N. Murillo Hernandez, and C. . Bernal Ruiz, “Piezoelectric Actuators Mode of Vibration Influence on Energy Harvesting Applications”, Jorn. jovenes investig. I3A, vol. 9, Nov. 2021, doi: 10.26754/jjii3a.20215975.