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APA Citation
Yang, K., Luo, H., Li, P., Wen, F., Gu, Y., & Wu, Z. (2023). controlling spacing of double-ring perfect optical vortex using the Fourier transform of Bessel beam with axicon phase. Optics & laser technology, 158, . http://access.bl.uk/ark:/81055/vdc_100170511078.0x000058