@Article{ 
  kov10a,
  author = { Kovarik, Hynek },
  title = { Heat kernels of two-dimensional magnetic Schrödinger and Pauli operators  },
  journal = { Calc. Var. Partial Differential Equations },
  year = { 2012 },
  volume = { 44 },
  pages = { 351–374 },
  URL = { http://cvgmt.sns.it/paper/1457/ },
  note = { cvgmt preprint}
}