[1]
J. Szadkowski, “Differential manifolds of the optimal solutions of a system of three ordinary equations”, Arch. Mech., vol. 48, no. 1, pp. 3–23, Jan. 1996, Accessed: Jan. 17, 2026. [Online]. Available: http://am.ippt.gov.pl/index.php/am/article/view/v48p3