[886] The homology groups of some ordered systems

[887] On maximal functions generated by Fourier multipliers

[888] Area integral estimates for elliptic differential operators with non-smooth coefficients

[889] On the existence of angular limits of$n$-dimensional quasiconformal mappings

[890] On non-linear differential equations of the second order: IV. The general equation $$\ddot y + kf\left( y \right)\dot y + g\left( y \right) = bkp\left( \varphi \right)$$ , φ=$t$+α, φ=$t$+α