CHLADA, Milan, PŘEVOROVSKÝ, Zdeněk, HEŘMÁNEK, Jan, KROFTA, Josef. Multilevel Analysis of Continuous AE from Helicopter Gearbox. E-Journal of Nondestructive Testing & Ultrasonics. 2014, 19(12). ISSN 1435-4934. Available: http://www.ndt.net/events/ECNDT2014/app/content/Paper/630_Chlada_Rev1.pdf