O. Balagurin, H. Kayal, and H. Wojtkowiak. 8th IAA Symposium on Small Satellites for Earth Observation, International Academy of Astronautics, (April 2011)
H. Wojtkowiak, O. Balagurin, and H. Kayal. 62nd International Astronautical Congress, IAC-11,C1,6,7,x10267, International Astronautical Federation, (2011)
H. Kayal, O. Balagurin, and H. Wojtkowiak. 63rd International Astronautical Congress, IAC-12,B4,3,2,x13917, International Astronautical Federation, (2012)
H. Wojtkowiak, O. Balagurin, G. Fellinger, and H. Kayal. 6th International Conference on Recent Advances in Space Technologies (RAST), AIAA American Institute of Aeronautics and Astronautics, (2013)