García F, Solano J, Fuentes M, Rubio E. Implementation of a heterodyne demodulator for blood flow sense discrimination in a bi-directional ultrasonic Doppler detector. Rev Mex Ing Biom [Internet]. 2015 Sep. 15 [cited 2024 Apr. 19];36(3):249-56. Available from: http://rmib.com.mx/index.php/rmib/article/view/105