Babak, V. Р.     Main Direction of Research at the National Aviation University [Текст] / V.Р. Babak // Proceedings of the International Symposium on Advancement of Aerospace Education and Collaborative Research in the 21st Century. June 17-19, 2004 : to Commemorate the Opening of HAU Aerospace Center / Hankuk Aviation University. — Hankuk, 2004. — P. 213-218.