Includes bibliographical references.

On a class of spaces containing all metric spaces and all locally bicompact spaces /; On extension of mappings of topological spaces /; On Pontrjagin classes. I /; On Pontrjagin classes. II /; On Pontrjagin classes. IV /; Some remarks on limiting spaces of Postnikoy systems /; On simple systems of paths on complete pretzels /; Parallel and normal correspondence of two-dimensional surfaces in the four-dimensional Euclidean space _4 /; On Demoulin transforms of projective minimal surfaces. I /; On Demoulin transforms of projective minimal surfaces. II /; A method for determining a quarternary differential quadratic form with prescribed charateristics /; A characterization of Riemannian manifolds /; An invariant tensor criterion for conformally reducible Riemannian spaces /; Conformally Euclidean generalized Riemannian spaces /; Completely reducible connections /; Connections in homogeneous bundles /; The theory of the curvature of _2 in _4 / A. V. Arhangelskii; N. Velicko; Wu Wen-Tsun; Wu Wen-Tsun; Wu Wen-Tsun; E. G. Skljarenko; H. [Zieschang Cisang, Heiner]; L. N. Krivonosov; Su Bu-Chin; Su Bu-Chin; P. I. Petrov; P. I. Petrov; A. M. Ancikov; S. M. Bahrah; V. I. Vedernikov; Ju. G. Lumiste; K. S. Ramazanova