KASINA, Zbigniew. “The Analysis of the Effectiveness of the Seismic Noise Attenuation by Means of Karhunen-Loeve (K-L) Transform”. Geology, Geophysics and Environment, vol. 36, no. 2, Apr. 2010, p. 203, https://doi.org/10.7494/geol.2010.36.2.203.