%0 Journal Article %A Yakubov, Yakov %T Completeness of elementary solutions of second order elliptic equations in a semi-infinite tube domain %J Electronic journal of differential equations %D 2002 %V 2002 %U http://geodesic.mathdoc.fr/item/EJDE_2002__2002__a39/ %G en %F EJDE_2002__2002__a39