1. Beyer RT, Letcher SV. Physical ultrasonic. New York: Academic Press; 1969.
2. Angelsen BAJ. Ultrasound imaging: waves, signals, and signal processing. Trondhein: Emantec AS; 2000.
3. Jensen JA. Estimation of blood velocities using ultrasound: a signal processing approach. New York: Cambridge University Press; 1996.
4. Kinsler LE, Frey P. Fundamentals of acoustics. New York: John Wiley & Sons; 1962.
5. Azhari H. Basics of biomedical ultrasound for engineers. Hoboken: Wiley–IEEE Press; 2010.