Kotlarska, Irmina. “International Language volapük (wolapik) — Career and Barrier”. Philology As the Ordering of Chaos: Language and Text Studies. Ad Honorem Professoris Marci Cybulski, edited by Ewa Woźniak and Anna Lenartowicz-Zagrodna, Lodz University Press, 2018, pp. 35-49, https://doi.org/10.18778/8142-402-8.04.