Asymptotics of Kolmogorov diameters for some classes of harmonic functions on spheroids

Let Gamma(D)(K) be the unit ball of the space of all bounded harmonic functions ina domain D in R-3, considered as a compact subset of the Banach space C(K), where K is a compact subset of D. The old problem about the exact asymptotics for Kolmogorov diameters (widths) of this set,