@Article{ ByDiWiUl14,
  author  ="{B}yrenheid, {G}lenn and {D}\utilde{u}ng, {D}inh and {S}ickel, {W}infried and {U}llrich, {T}ino",
  title   ="Sampling on energy-norm based sparse grids for the optimal
recovery of {S}obolev type functions in ${H}^{\gamma}$ ",
  year    = "2016",
  volume = "207",
  pages= "207--231",
  journal = "J. Approx. Theory",
  annote  = {journal, group},
  eprint  = {1408.3498},
  pdf     = {http://ullrich.ins.uni-bonn.de/SamplingEnergyNorm.pdf}
}