V. V. . Balashchenko and V. N. . Kunitsa, “Invariant f-structures on the four-dimensional oscillator group”, Журнал Белорусского государственного университета. Математика. Информатика, no. 1, pp. 51–57, Jun. 2025, Accessed: Jul. 18, 2026. [Online]. Available: https://journals.bsu.by/index.php/mathematics/article/view/6734