@article{abstractionforzoomingintounsolvability,
  title = {Abstraction for Zooming-In to Unsolvability Reasons of Grid-Cell Problems},
  author = {Thomas Eiter and Zeynep G. Saribatur and Peter Schüller},
  year = {2019},
  eprint = {1909.04998},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1909.04998v1},
}