Wróblewska, E. K., J. A. Soroka, and Z. Rosłaniec. “Solvatochromic Dyes in the Investigations of polymers’ Structures. Part 2, Diffusion Profiles in Selected copoly(esterethers)”. Polimery, vol. 50, no. 4, Sept. 2022, pp. 286-90, https://ichp.vot.pl/index.php/p/article/view/1633.