S. L. Gefter, A. L. Piven, “Implicit linear nonhomogeneous difference equation in Banach and locally convex spaces”, Zh. Mat. Fiz. Anal. Geom., 15:3 (2019), 336–353
A. L. Piven, “Condition of completeness of elementary solutions for degenerate higher order operator differential equations”, Mat. Fiz. Anal. Geom., 12:1 (2005), 86–102
Contact us: