Kajak, Piotr. “Which Came First, the Chicken or the Egg? – Chronological Reflections Upon the Beginnings of Teaching Polish As a Foreign Language in Lodz and Warsaw”. Acta Universitatis Lodziensis. Kształcenie Polonistyczne Cudzoziemców, vol. 30, Dec. 2023, pp. 417-32, doi:10.18778/0860-6587.30.25.