Źródła do biogramu:
R. Badouin de Courtenay, [Dzienniki], Polska Akademia Nauk. Archiwum w Warszawie, sygn. III-298;
M. Smoczyńska, The case of Sławuś: an atypical development of first person self-reference in Jan Baudouin de Courtenay's polish diary data, Psychology of Language and Communication 2000, Vol. 4. No. 2, p. 3-21;
https://um.pabianice.pl/artykul/110/205/baudouin-de-courtenay.