K. Wegner, T. Grajek, A. Grzelka, M. Lorkiewicz, R. Ratajczak, O. Stankiewicz, J. Stankowski, H. Żabiński, M. Domański, “Depth Estimation Reference Software extension for lightfield images”, ISO/IEC JTC1/SC29/WG11 MPEG2019, m46126, Marrakech, Morocco, 13-19 January 2019,