TY - JOUR AU - A. Zozulya AU - Dana Anderson BT - Optics Letters DA - 1995-01 DO - 10.1364/OL.20.000837 PY - 1995 EP - 837 T2 - Optics Letters TI - Nonstationary self-focusing in photorefractive media VL - 20 SN - 0146-9592 ER -