1. ANDREEV, B. V., FIZIOLOGICHESKII ZHURNAL SSSR 36: 429 (1950).
2. ASERINSKY, E, FEDERATION PROCEEDINGS 12: 6 (1953).
3. BURFORD, G. E., ANESTHESIA & ANALGESIA 20: 191 (1941).
4. DE TONI, G, PEDIATRIA 41: 489 (1933).
5. FUCHS, A, AMERICAN JOURNAL OF OPHTHALMOLOGY 31: 717 (1948).