N. I. Serov, L. O. Tulupova, and V. I. Fushchich, “Conditional symmetry of the Navier-Stokes equations”, Ukr. Mat. Zhurn., vol. 49, no. 6, pp. 806–813, Jun. 1997, Accessed: Feb. 17, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5065