Judek, Slawomir, and Leszek Jarzebowicz. “Wavelet Transform-Based Approach to Defect Identification in Railway Carbon Contact Strips”. Elektronika ir Elektrotechnika 21, no. 6 (December 3, 2015): 29-33. Accessed December 3, 2021. https://eejournal.ktu.lt/index.php/elt/article/view/13755.