A Precision Optical Calibration Module (POCAM) for IceCube-Gen2M. Jurkovič, K. Abraham, K. Holzapfel, K. Krings, E. Resconi and J. VeenkampEPJ Web of Conferences, 116 (2016) 06001DOI: https://doi.org/10.1051/epjconf/201611606001