Light Backscattering by Ice Crystals of Cirrus Clouds Within the Physical Optics ApproximationAlexander Konoshonkin, Anatoli Borovoi, Natalia Kustova, Zhenzhu Wang, Dong Liu and Chenbo XieEPJ Web Conf., 237 (2020) 08011DOI: https://doi.org/10.1051/epjconf/202023708011