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- Coulter, N. A., JR. and Pappenheimer, J. R.: Development of turbulence in flowing blood. Amer J Physiol 159:401–408, 1949.
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- Gasul, B. M., Arcilla, R. A. and LEV, M.: Heart Disease in Infants and Children. Philadelphia, J. B. Lippincott Company, 1966, p 51.