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Chew, Khian Hooi and Wu, Q.Y. and Chen, R.P. and Zhong, L.X. (2012) Propagation properties and M-2 factors of a vortex airy beam. Optics & Laser Technology, 44 (7). pp. 2015-2019. ISSN 0030-3992, DOI https://doi.org/10.1016/j.optlastec.2012.03.038.