@article{Dittler,
  author    = {Ullrich Dittler},
  title     = {Die DSLR als Ha-Teleskop: Das Ha-Filtersystem Camera Quark von Daystar im Test},
  series = {Abenteuer Astronomie},
  number    = {10},
  issn      = {2366-3944},
  pages     = {62 -- 65},
  language  = {de}
}