@article{LadleifWeske2021,
  author    = {Ladleif, Jan and Weske, Mathias},
  title     = {Which event happened first?},
  series = {Frontiers in blockchain},
  volume    = {4},
  journal   = {Frontiers in blockchain},
  publisher = {Frontiers in Blockchain},
  address   = {Lausanne, Schweiz},
  issn      = {2624-7852},
  doi       = {10.3389/fbloc.2021.758169},
  pages     = {1 -- 16},
  year      = {2021},
  abstract  = {First come, first served: Critical choices between alternative actions are often made based on events external to an organization, and reacting promptly to their occurrence can be a major advantage over the competition. In Business Process Management (BPM), such deferred choices can be expressed in process models, and they are an important aspect of process engines. Blockchain-based process execution approaches are no exception to this, but are severely limited by the inherent properties of the platform: The isolated environment prevents direct access to external entities and data, and the non-continual runtime based entirely on atomic transactions impedes the monitoring and detection of events. In this paper we provide an in-depth examination of the semantics of deferred choice, and transfer them to environments such as the blockchain. We introduce and compare several oracle architectures able to satisfy certain requirements, and show that they can be implemented using state-of-the-art blockchain technology.},
  language  = {en}
}
@article{MendlingWebervanderAalstetal.2018,
  author    = {Mendling, Jan and Weber, Ingo and van der Aalst, Wil and Brocke, Jan Vom and Cabanillas, Cristina and Daniel, Florian and Debois, Soren and Di Ciccio, Claudio and Dumas, Marlon and Dustdar, Schahram and Gal, Avigdor and Garcia-Banuelos, Luciano and Governatori, Guido and Hull, Richard and La Rosa, Marcello and Leopold, Henrik and Leymann, Frank and Recker, Jan and Reichert, Manfred and Reijers, Hajo A. and Rinderle-Ma, Stefanie and Solti, Andreas and Rosemann, Michael and Schulte, Stefan and Singh, Munindar P. and Slaats, Tijs and Staples, Mark and Weber, Barbara and Weidlich, Matthias and Weske, Mathias and Xu, Xiwei and Zhu, Liming},
  title     = {Blockchains for Business Process Management},
  series = {ACM Transactions on Management Information Systems},
  volume    = {9},
  journal   = {ACM Transactions on Management Information Systems},
  number    = {1},
  publisher = {Association for Computing Machinery},
  address   = {New York},
  issn      = {2158-656X},
  doi       = {10.1145/3183367},
  pages     = {1 -- 16},
  year      = {2018},
  abstract  = {Blockchain technology offers a sizable promise to rethink the way interorganizational business processes are managed because of its potential to realize execution without a central party serving as a single point of trust (and failure). To stimulate research on this promise and the limits thereof, in this article, we outline the challenges and opportunities of blockchain for business process management (BPM). We first reflect how blockchains could be used in the context of the established BPM lifecycle and second how they might become relevant beyond. We conclude our discourse with a summary of seven research directions for investigating the application of blockchain technology in the context of BPM.},
  language  = {en}
}