Medvedev V. K.
Ukr. Mat. Zh. - 1997. - 49, № 10. - pp. 1345–1359
We find necessary conditions that should be imposed on a number n for the existence of an arbitrary configuration in at least one finite projective plane of order n.
Ukr. Mat. Zh. - 1994. - 46, № 5. - pp. 516–523
By using a generalized quadrangle as an example, we verify the assumption that coordinate systems (different from the standard Cartesian coordinate system) exist not only in an arbitrary projective plane, where they are determined by a nondegenerate quadrangle, but also in some other combinatorial objects.
Ukr. Mat. Zh. - 1989. - 41, № 10. - pp. 1313–1318
Ukr. Mat. Zh. - 1989. - 41, № 9. - pp. 1239–1244