Kusak, Leszek. “Between Destiny and Free Choice: The Contingency of Man in Albert Schweitzer’s Philosophy”. Krakow Review of Economics and Management Zeszyty Naukowe Uniwersytetu Ekonomicznego W Krakowie, no. 4(952), Oct. 2016, pp. 65-78, https://doi.org/10.15678/ZNUEK.2016.0952.0405.