@article{Schulze2009,
  author    = {Bert-Wolfgang Schulze},
  title     = {On a paper of Krupchyk, Tarkhanov, and Tuomela},
  doi       = {10.1016/j.jfa.2008.07.024},
  url       = {http://www.sciencedirect.com/science/journal/00221236},
  year      = {2009},
}