TY JOUR TI Correct solvability of some nonstationary problems in two-dimensional weighted stepanov spaces KW boundary value problem KW semigroup KW fractional powers of operators. JO Actual directions of scientific researches of the XXI century: theory and practice AU Kostin, V.. AU Pisareva, S.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov