Shilova G I

Publications in Math-Net.Ru

1. The number of periodic solutions of the second kind to the differential equation $\ddot{\varphi}-f_1(\varphi)\dot{\varphi}-f_0(\varphi)=0$
   
   Differ. Uravn., 3:10 (1967),  1682–1691
2. Existence of absolute minimum of multiple integrals in calculus of variations in non-parametric form
   
   Mat. Sb. (N.S.), 51(93):2 (1960),  253–272