% Appendix bibliography. Keys cited only after the "Online Supplementary
% Materials" heading belong here.

@article{AppendixOnlyKey2021,
  author  = {Author, Other},
  title   = {A Placeholder Appendix Reference},
  journal = {Journal of Supplements},
  year    = {2021},
  volume  = {2},
  pages   = {11--20},
}
