Gravitation and Cosmology.
Том 6.
2000.
С. 27-40
From the summary: "It is shown that any correct left F-quasigroup generates in a unique way a reductive space with specific reductant, the so-called natural F-space, and that any reductive F-space can be considered in a canonical way as a correct left F-quasigroup whose natural F-space is isomorphic to the initial one."