Wywiał, Janusz L. 2017. “On the Evaluation of Sample Size Required for a Good Approximation by the Normal Curve for Some Statistics”. Krakow Review of Economics and Management Zeszyty Naukowe Uniwersytetu Ekonomicznego W Krakowie, no. 5(965) (November): 17-29. https://doi.org/10.15678/ZNUEK.2017.0965.0502.