2 http://hdl.handle.net/10338.dmlcz/142192 2 Contents http://hdl.handle.net/10338.dmlcz/142196 Contents Publications http://hdl.handle.net/10338.dmlcz/142195 Publications Accretion process in comets http://hdl.handle.net/10338.dmlcz/142194 Accretion process in comets Absolut brightness of comet Ikya-Seki 1965 f and of other comets of Kreutz's group http://hdl.handle.net/10338.dmlcz/142193 Absolut brightness of comet Ikya-Seki 1965 f and of other comets of Kreutz's group