1. Local behavior of solutions of general linear elliptic equations;Bers;Comm. Pure Appl. Math.,1955
2. Isoperimetric inequalities: differential geometric and analytic perspectives;Chavel,2001
3. L. De Carli, J. Edward, S. Hudson, M. Leckband, Minimal support results for Schrödinger equations, (2011), Preprint.
4. Geometric remarks on the level curves of harmonic functions;De Carli;Bull. Lond. Math. Soc.,2010
5. Nodal sets of eigenfunctions on Riemannian manifolds;Donnelly;Invent. Math.,1988