@Misc{ Csa15, author = { Csato, Gyula }, title = { An Isoperimetric Problem With Density and the Hardy Sobolev Inequality in $\mathbb{R}^2$ }, journal = { }, year = { 2015 }, pages = { }, URL = { http://cvgmt.sns.it/paper/2652/ }, note = { cvgmt preprint} }