Mollifying operators with variable step and their application to approximation by infinitely differentiable functions Authors: Burenkov, V. I. Pages: 5-37
On differentiability of the extremals of variational integrals Authors: Giaquinta, Mariano Pages: 38-92
Theory of multipliers in spaces of differentiable functions and its applications Authors: Maz'ya, V. G. Pages: 150-190
Topological methods of investigation of operator equations and nonlinear boundary value problems Authors: Skrypnik, I. V. Pages: 191-233