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. НК [Internet]. 2008 Sep. 29 [cited 2026 Jan. 21];11(3):421-36. Available from: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/490