1. A synopsis of ophthalmic ultrasonography;Baum;Wiss. Z. Humbold-Univ. Berlin,1965
2. The application of ultrasonic locating techniques to ophthalmology. Part. I. Reflective properties;Baum;Amer. J. Ophth.,1958
3. Application of ultrasonic locating techniques to ophthalmology. Part II. Ultrasonic slit-lamp in the ultrasonic visualisation of soft tissues;Baum;Arch. Ophthal., Chicago,1958
4. Probleme und Fortschritte der Ultraschalldiagnostik am Auge;Buschmann;Klin. Mbl. Augenheilk.,1964