%0 Journal Article %A Youri V. Egorov %A Vladimir A. Kondratiev %A Bert-Wolfgang Schulze %T On completeness of root functions of elliptic boundary problems in a domain with conical points on the boundary %J Comptes Rendus. Mathématique %D 2002 %P 649-654 %V 334 %N 8 %I Elsevier %R 10.1016/S1631-073X(02)02320-8 %G en %F CRMATH_2002__334_8_649_0