[Oxford Encyclopedia of Personalities of the Republic of Poland] Oxford Encyklopedia – Osobistości Rzeczypospolitej Polskiej, entry: Krzysztof Kościelniak, London: An Oxford Encyclopedia Publication 2016, pp. 555–556 (presentation of Prof. Krzysztof Kościelniak’s activities and achievements till 2016); Polish Scholarly Bibliography (PBN) – the portal of the Polish Ministry of Science, Polska Bibliografia Naukowa PBN, Krzysztof Kościelniak (complete list of Prof. Krzysztof Kościelniak’s published scientific works), [accessed: 12.07.2016].