A New Operator for Elliptic Equations, and the P-compactification for ...u = P u. M. NAKAI; L. SABIO — 1970 Mathematische Annalen
A Property of Biharmonic Functions with Dirichlet Finite Laplacians. M. Nakai; L. Sario — 1971 Mathematica Scandinavica
Examples in the Classification Theory of Riemannian Manifolds and the Equation ...u = Pu. M. Glasner; R. Katz; M. Nakai — 1971 Mathematische Zeitschrift