@article {doi:10.1142/S0218202509003589,
	title = {Solutions of the Schr{\"o}dinger{\textendash}Poisson problem concentrating on spheres, part I: necessary conditions},
	journal = {Mathematical Models and Methods in Applied Sciences},
	volume = {19},
	number = {05},
	year = {2009},
	pages = {707-720},
	abstract = {<p>In this paper we study a coupled nonlinear Schr{\"o}dinger{\textendash}Poisson problem with radial functions. This system has been introduced as a model describing standing waves for the nonlinear Schr{\"o}dinger equations in the presence of the electrostatic field. We provide necessary conditions for concentration on sphere for the solutions of this kind of problem extending the results already known.</p>},
	doi = {10.1142/S0218202509003589},
	url = {https://doi.org/10.1142/S0218202509003589},
	author = {Ianni, Isabella and Giusi Vaira}
}
