@Article{ 
  Erh14,
  author = { Erhardt, André H. },
  title = { Higher integrability for solutions to parabolic problems with irregular obstacles and nonstandard growth },
  journal = { J. Math. Anal. Appl. },
  year = { 2016 },
  doi = { 10.1016/j.jmaa.2015.11.028 },
  volume = { 435 },
  number = { 2 },
  pages = { 1772–1803 },
  URL = { http://cvgmt.sns.it/paper/2351/ },
  note = { cvgmt preprint}
}