Smutný, Jaroslav, Dušan Janoštík, and Viktor Nohál. “THE USE OF THE HILBERT HUANG TRANSFORMATION IN THE TESTING OF RAILWAY STRUCTURES”. Journal Akustika 40, no. 40 (September 29, 2021). Accessed October 25, 2021. https://journalakustika.com/index.php/akustika/article/view/74.