ITO, M.; KATÔ, K. VIRTUAL STATE. International Journal of Mathematics and Physics, [S. l.], v. 17, n. 1, p. 4–21, 2026. DOI: 10.26577/ijmph.20261711. Disponível em: https://ijmph.kaznu.kz/index.php/kaznu/article/view/1263. Acesso em: 10 jun. 2026.