Суділовська, Вероніка І. 2015. “Description Operator C-Symmetry in the Case of the Space C^2”. Visnyk of V. N. Karazin Kharkiv National University. Ser. Mathematics, Applied Mathematics and Mechanics 82 (December), 19–26. https://doi.org/10.26565/2221-5646-2015-82-02.