1. S. L. Sobolev, Cubature Formulas and Modern Analysis: An Introduction, Gordon and Breach, Montreux (1992).
2. M. Cantor, “Spaces of functions with asymptotic conditions on ℝ,” Indiana Univ. Math. J. 24, No. 9, 897-902 (1975).
3. R. C. McOwen, The behavior of the Laplacian on weighted Sobolev spaces,” Commun. Pure Appl. Math. 32, No. 6, 783–795 (1979).
4. L. A. Bagirov and V. A. Kondratiev, “Elliptic equations in R n ,” Differ. Equations 11, 375–379 (1975).
5. M. Cantor, “Some problems of global analysis on asymptotically simple manifolds,” Compos. Math. 38, No. 1, 3–35 (1979).