Vasil'evich, Korolenko Pavel, Zotov Alexei Mikhailovich, Kubanov Rustam Tatarhanovich, and Pavlov Nikolai Nikolaevich. “Vortex Diffractal in Free Space”. Fundamental Research and Application of Physical Science Vol. 1 (March 16, 2023): 67–75. Accessed June 13, 2026. https://stm.bookpi.org/FRAPS-V1/article/view/9975.