@article{51,
  author = {James Tung and William Gage and Karl Zabjek and Brian Maki and William McIlroy},
  title = {Frontal plane standing balance with an ambulation aid: Upper limb biomechanics},
  year = {2011},
  journal = {Journal of biomechanics},
  volume = {44},
  number = {8},
  pages = {1466\textendash1470},
  publisher = {Elsevier},
}