ON ANAESTHESIA AND TECHNIQUE OF CERTAIN MICRO OPERATIONS ON THE LARYNX (RUSSIAN) Article Umanov I.M., Galperina N.S., Preobrazhensky Yu.B. Zhurnal Ushnykh Nosovykh i Gorlovykh Boleznei. Vol. 36. 1976. P. 10-13
COMPARATIVE DATA ON THE USE OF SOME PREPARATIONS FOR SUPERFICIAL ANESTHESIA DURING CERTAIN OTORHINOLARYNGEAL OPERATIONS (RUSSIAN) Article Prianishnikov N.T., Charintsev V.G., Preobrazhensky Yu.B. Zhurnal Ushnykh Nosovykh i Gorlovykh Boleznei. Vol. 36. 1976. P. 73-77