AV Mamaev, M Saffman, DZ Anderson, AA Zozulya. Physical Review A 54 (1), 870, 1996. 223: 1996: Propagation of dark stripe beams in nonlinear media: snake instability and creation of optical vortices. AV Mamaev, M Saffman, AA Zozulya. Physical review letters 76 (13), 2262, 1996. 212: More @Wikipedia
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