%0 Journal Article %J Adv. Nonlinear Stud. %D 2020 %T The $\varepsilon-\varepsilon^β$ property in the isoperimetric problem with double density, and the regularity of isoperimetric sets %A Pratelli, A. %A Saracco, G. %B Adv. Nonlinear Stud. %V 20 %P 539–555 %G eng %R 10.1515/ans-2020-2074