TY - JOUR AU - Paul, B AU - Dowell, M AU - Gallagher, A AU - Cooper, J C2 - Physical Review A (Atomic, Molecular and Optical Physics) DA - 1999-01-01 LA - en M1 - 59 PB - Physical Review A (Atomic, Molecular and Optical Physics) PY - 1999 TI - Observation of conical emission from a single self-trapped beam ER -