@Article{ 
  ButAl-12,
  author = { Buttazzo, Giuseppe and Nayam, Al-hassem },
  title = { Stationary Configuration of some Optimal Shaping },
  journal = { International journal of dynamical system and differential equation },
  year = { 2012 },
  volume = { 4 },
  pages = { 198-214 },
  URL = { http://cvgmt.sns.it/paper/1836/ },
  note = { cvgmt preprint}
}