Niemira, Artur. “The Mercy in the Pope Francis’s Teachings towards the Youth on the Occasion of 31st World Youth Day 2016 in Cracow”. Studia Włocławskie, vol. 20, Aug. 2021, pp. 309-24, https://ttn.wloclawek.pl/czasopisma/StudiaWloclawskie/article/view/167.