Exponential behaviour of eigenfunctions and gaps in the essential spectrum -- Laplace integrals in singular differential and difference equations -- Continuation and reflection of solutions to parabolic partial differential equations -- Legendre polynomials and singular differential operators -- Singularities of 3-dimensional potential functions at the vertices and at the edges of the boundary -- Singular perturbations of elliptic boundary value problems -- Singular perturbations of semilinear second order systems -- Higher order necessary conditions in optimal control theory -- Range of nonlinear perturbations of linear operators with an infinite dimensional kernel -- Some classes of integral and integro-differential equations of convolutional type -- Multiparameter periodic differential equations -- Uniform scale functions and the asymptotic expansion of integrals