@Article{ 
  AmbEss22,
  author = { Ambrosio, Vincenzo and Essebei, Fares },
  title = { Multiple solutions for double phase problems in $\mathbb{R}^n$ via Ricceri's principle },
  journal = { Journal of Mathematical Analysis and Applications },
  year = { 2023 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5773/ },
  note = { cvgmt preprint}
}