1. K. McNutt and K. Ossoinig. Echographic measurement of extraocular muscles, ultrasound in medicine, Vol. 3A. (Proceedings of the 1st WFUMB) Plenum Press, New York, 1976;927.
2. K. Ossoinig. Die Ultraschalldiagnostik der Orbita. Klin Monatsbl. Augenheilk. 1966;149:817.
3. K. Ossoinig. Echography of the eye, orbit, and periorbital region. (Orbit roentogenology, edited by P.G. Ager), John Wiley & Sons, New York, 1977.
4. L.C. McNutt. Echographic measurement of extraocular muscles applied in Graves’ orbit-opathy, Proceeding of XXIII Concilium Ophthalmologicum Kyoto 1978. (ACTA), 1842, Excerpta Medica, Amsterdam, 1979.
5. S. Duke-Elder. System of ophthalmology. Vol. II, 414. Henry Kimpton, London, 1976.