On extremal solutions of the three boundary value problems
for the fifth order ordinary differential equations (Russian)
N.I. Vasilyev
Extremal solutions of boundary
value problems for the fifth order
ordinary differential equations (Russian)
On extremals of some functionals in a plane (Russian)
On extremals of a certain functional (Russian)
A. Ya. Lepin
Nonlinear boundary problems for
$\varphi$-Laplacian (Russian)
The relation between the lower and upper functions and solvability of the Dirichlet boundary value problem (Russian)
On solution set of a two-parameter nonlinear oscillator: the Neumann problem
On polynomials of optimal shape and the number of period annuli
The Upper and Lower Functions Method for One-dimensional
$\Phi$-Laplacians
On the Properties of Solutions of the Third Order Nonlinear Differential Equations and their Applications