1. Birth of the stethoscope
2. V. A. McKusick, Cardiovascular Sound, Baltimore, Williams Wilkins, 1958.
3. M. L. Rice and D. J. Doyle, “Comparison of phonocardiographic monitoring location,” in Proc. 17th , Annu Int Conf IEEE Eng Med Biol Soc, Montreal, Canada, pp. 685-686, 1995.
4. Development and Implementation of Noise-Canceling Technology for Digital Stethoscope
5. Design and implementation of a low cost electronic stethoscope