TY - JOUR AU - A. Mamaev AU - M. Saffman AU - A. Zozulya BT - Physical Review A DA - Jan-09-1997 DO - 10.1103/PhysRevA.56.R1713 PY - 1997 SP - R1713 EP - R1716 T2 - Physical Review A TI - Time-dependent evolution of an optical vortex in photorefractive media UR - http://link.aps.org/doi/10.1103/PhysRevA.56.R1713 VL - 56 SN - 1050-2947 ER -