@article{nondeterministicapproximationoperators,
  title = {Non-deterministic approximation operators: ultimate operators, semi-equilibrium semantics and aggregates (full version)},
  author = {Jesse Heyninck and Bart Bogaerts},
  year = {2023},
  eprint = {2305.10846},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2305.10846v1},
}