@article{mappingpatternsforvirtualknowledgegraphs,
  title = {Mapping Patterns for Virtual Knowledge Graphs},
  author = {Diego Calvanese and Avigdor Gal and Davide Lanti and Marco Montali and Alessandro Mosca and Roee Shraga},
  year = {2020},
  eprint = {2012.01917},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2012.01917v2},
}