@article{article8a3851b7,
title   = {Load-insensitive active quasi-circulator for continuous-wave Doppler ultrasound applications},
author = {Santini, Tales Roberto de Souza and Ibrahim, T. S. and Maciel, Carlos Dias},
year = {2016},
doi = {10.1049/el.2016.2574},
journal   = {Electronisc Letters}
}