Udal, A., Kukk, V. and Velmre, E. (2009) “Critical Analysis of Uncertainty Relations Based on Signal Duration and Spectrum Width”, Elektronika ir Elektrotechnika, 94(6), pp. 31-34. Available at: https://eejournal.ktu.lt/index.php/elt/article/view/10098 (Accessed: 27September2022).