TY JOUR TI METHOD OF DETERMINING A POSTERIORI ERROR ESTIMATION IN CALCULATIONS OF COMPOSITE SHELLS USING MULTIGRID FINITE ELEMENTS KW a posteriori error estimates KW L2 norm KW discrete model KW convergence of solution sequence KW elasticity KW cylindrical shell KW multigrid finite elements JO Vestnik of Astrakhan State Technical University. Series: Management, computer science and informatics AU Grishanov, A.. PY 2018 IS PB Astrakhan State Technical University