Retrieving microphysics of cirrus clouds from data measured with raman lidar ramses and a tilted ceilometerAnatoli Borovoi, Jens Reichardt, Ulrich Görsdorf, Veronika Wolf, Alexander Konoshonkin, Victor Shishko and Natalia KustovaEPJ Web Conf., 176 (2018) 08002DOI: https://doi.org/10.1051/epjconf/201817608002