OPTICAL PHONON AND ENERGY-GAP SPECTROSCOPY IN YBA2CU3OX -н Agladze, N, Boldirev, N, Burlakov, V, Chepurko, G, Denisov, V, Kiselev, S, Kuzik, L, Lerner, I, Lozovik, Y, Mavrin, B, Podobedov, V, Popova, M, Shulga, S, Yakovlev, V, Zhizhin, G