García-Nocetti F, F., J. Solano González, E. Rubio Acosta, and E. Moreno Hernández. “Parallel Computing in Time-Frequency Distributions for Doppler Ultrasound Blood Flow Instrumentation”. Revista Mexicana De Ingenieria Biomedica, vol. 22, no. 1, Mar. 2001, p. 8, https://rmib.com.mx/index.php/rmib/article/view/418.