PahiryaM. M. Continued-Fractions Representations of the Functions $\mathrm{s}\mathrm{h} Z, \mathrm{c}\mathrm{h} Z, \mathrm{s}\mathrm{i}\mathrm{n} Z, \mathrm{c}\mathrm{o}\mathrm{s} Z$. Ukr. Mat. Zhurn. 2018, 70, 682-698.