@article{r2rmlmappingsinobdasystemsenabling,
  title = {R2RML Mappings in OBDA Systems: Enabling Comparison among OBDA Tools},
  author = {Manuel Namici},
  year = {2018},
  eprint = {1804.01405},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1804.01405v1},
}