Czarniecki, Piotr. “Eucharist With Spiritual Food for Eternal Life on the Example of the Teaching of St. Joseph Sebastian Pelczar”. Kwartalnik Naukowy Fides Et Ratio, vol. 33, no. 1, Mar. 2018, pp. 35-47, https://fidesetratio.com.pl/ojs/index.php/FetR/article/view/578.