OHTA, M., et al. “Unification of Various Type Expressions for Probability Distribution of Arbitrary Random Noise and Vibration Waves Based on Their Actual Fluctuation Ranges (theory and Experiment)”. Archives of Acoustics, vol. 15, no. 3-4, May 2014, pp. 399-16, https://acoustics3.ippt.pan.pl/index.php/aa/article/view/1297.