Ando, K., H. Kang, Y. Miyanishi, and M. . . Putinar. “Generic Properties of the Neumann-Poincaré Operator: Simplicity of Eigenvalues and Cyclic Vectors”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE, May 2025, p. 16, doi:10.2422/2036-2145.202312_013.