@article{LadleifWeske2021,
  author    = {Jan Ladleif and Mathias Weske},
  title     = {Which event happened first?},
  journal   = {Frontiers in blockchain},
  series    = {Deferred choice on blockchain using oracles},
  volume    = {4},
  pages     = {1 -- 16},
  doi       = {10.3389/fbloc.2021.758169},
  year      = {2021},
}