D. Avik, “A note on invariant submanifolds of $(k, μ)$-contact manifolds”, Ukr. Mat. Zhurn., vol. 62, no. 11, pp. 1555–1560, Nov. 2010, Accessed: Feb. 16, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2979