The asymptotic behaviour of oscillatory solutions of the equation of the fourth order
The asymptotic solution of higher-order differential equations with small final coefficient
The Blasius function in the complex plane.
The distribution of nonprincipal eigenvalues of singular second-order linear ordinary differential equations.
The generalized Cauchy problem for singularly perturbed impulsive systems in the critical case.
The period function near a polycycle with two semi-hyperbolic vertices
The width of resonances for slowly varying perturbations of one-dimensional periodic Schrödinger operators
Three point boundary value problem for singularly perturbed semilinear differential equations.