REFERENCES
- Giovanardi, A.: Effect of Sabin poliovirus vaccine on incidence of poliomyelitis in Italy. JAMA 209: 525–528 (July 28) 1969.
- Knapp, M. E.: Exercises for poliomyelitis. In Licht, S. (Editor): Therapeutic Exercise. Physical Medicine Library, vol 3. New Haven, Conn., Elizabeth Licht, Publisher, 1958, chap 20.