“Reversibility of the nonlinear operator $(\mathcal{L}x)(t)=H\bigl(x(t),\frac{d x(t)}{dt}\bigr)$ in the space of functions bounded on the real axis” (2008) Neliniini Kolyvannya, 11(3), pp. 421–436. Available at: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/490 (Accessed: 21 January 2026).