Kotlarska, I. International Language volapük (wolapik) — Career and Barrier. In Philology as the Ordering of Chaos: Language and Text Studies. Ad honorem Professoris Marci Cybulski; Woźniak, E., Lenartowicz-Zagrodna, A., Eds.; Lodz University Press: Poland, 2018; pp. 35-49. https://doi.org/10.18778/8142-402-8.04.