On Lebesgue Measure of Integral Self-Affine Sets. - Ievgen V. Bondarenko; Rostyslav V. Kravchenko (Discret. Comput. Geom., 2011)

On the lattice of subgroups of the lamplighter group. - Rostislav I. Grigorchuk; Rostyslav V. Kravchenko (Int. J. Algebra Comput., 2014)