1. Alekseevskiî, D.V.: Riemannian manifolds with exceptional holonomy groups Funkts. Anal. Prilozh.2(2), 1?10 (1968) [Engl. transl.: Funct. Anal. Appl.2, 97?105 (1968)]
2. Alekseevskiî, D.V.: Compact quaternion spaces. Funkts. Anal. Prilozh.2(2), 11?20 (1968) [Engl. transl.: Funct. Anal. Appl.2, 106?114 (1968)]
3. Alekseevskiî, D.V.: Quaternion Riemannian spaces with transitive reductive or solvable group of motions. Funkts. Anal. Prilozh.4 (4), 68?69 (1970) [Engl. transl.: Funct. Anal. Appl.4, 321?322 (1970)]
4. Alekseevskiî, D.V.: Classification of quaternionic spaces with a transitive solvable group of motions. Izv. Akad. Nauk SSSR Ser. Mat.9 (2), 315?362 (1975) [Engl. transl.: Math. USSR, Izv.9, 297?339 (1975)]
5. Atiyah, M.F., Hitchin, N.J., Singer, I.M.: Self-duality in four-dimensional Riemannian geometry. Proc. R. Soc. Lond., Ser. A362, 425?461 (1978)