1. Bom K, Boo J de, Rijsterborgh H. on the aliasing problem in PW-Doppler cardiac studies. J Clin Ultrasound. 1984;12:559.
2. Chapman JV, Sgalambro A. Basic concepts in Doppler echocardiography. Dordrecht: Martinus Nijhoff Publishers; 1988.
3. Galiuto L, Badano L, Fox K, et al. The EAE textbook of echocardiography. New York: Oxford University Press Inc.; 2011.
4. Hamer JPM. Practical echocardiography in the adult. With Doppler and color-Doppler flow imaging. Dordrecht: Kluwer Academic Publishers; 1990.
5. Hatle L, Angelson B. Doppler ultrasound in cardiology: physical principles and clinical applications, 2nd ed. Philadelphia: Lea & Febiger; 1984.