1. V. I. Shumakov, Med. Tekhnika, No. 6, 3 (1977).
2. P. M. Galletti, F. J. Martinez, D. E. Brinsfield, et al., Trans. Am. Soc. Artific. Intern. Organs,9, 244 (1963).
3. D. A. Murray, D. A. Gillis, and H. Lau, Canad. J. Surg.,19, 103 (1976).
4. M. Vives, R. Barthelemy, P. Puel, et al., Ann. Chir. Thorac. Cardiovasc.,15, 283 (1976).
5. N. Saxena, P. Hillyer, and L. Edmunds, J. Cardiovasc. Surg.,18, 1 (1977).