Homomorphism between Homotopy groups induced by elements of the sobolev space L1, p (M, N). Nobumitsu Nakauchi — 1993 Manuscripta mathematica
A remark on ∞ -harmonic functions on Riemannian manifolds. Nakauchi, Nobumitsu — 1995 Electronic Journal of Differential Equations (EJDE) [electronic only]