Tametsi Futura Prospicientibus [O Ježišovi Kristovi Vykupiteľovi], Lev XIII., 1. 11. 1900. <on-line: http://w2.vatican.va/content/leo-xiii/en/encyclicals/documents/hf_l-xiii_enc_01111900_tametsi-futura-prospicientibus.html>.
Tametsi Futura Prospicientibus [O Ježišovi Kristovi Vykupiteľovi], Lev XIII., 1. 11. 1900. <on-line: http://w2.vatican.va/content/leo-xiii/en/encyclicals/documents/hf_l-xiii_enc_01111900_tametsi-futura-prospicientibus.html>.