Marchevský, Stanislav Trends in E-Learning Services Delivery via Current Satellite Systems. Podhradský, Pavol, 1943-. Gamec, Ján. Galajda, Pavol. Gamcová, Mária. Pillár, Slavomír In: Acta Electrotechnica et Informatica. -- Vol. 9, No. 1 (2009), s.12-19.