PahiryaM.M. 2018. Continued-fractions representations of the functions $\mathrm{s}\mathrm{h} z, \mathrm{c}\mathrm{h} z, \mathrm{s}\mathrm{i}\mathrm{n} z, \mathrm{c}\mathrm{o}\mathrm{s} z$. Ukrains’kyi Matematychnyi Zhurnal. 70, 5 (May 2018), 682-698.