IVOA recommendation: Units in the VO

@inproceedings{Demleitner2015IVOARU,
  title={IVOA recommendation: Units in the VO},
  author={Markus Demleitner and S{\'e}bastien Derriere and Norman Gray and Mireille Louys and Françoise Ochsenbein},
  year={2015}
}
This document describes a recommended syntax for writing the string representation of unit labels (‘VOUnits’). In addition, it describes a set of recognised and deprecated units, which is as far as possible consistent with other relevant standards (BIPM, ISO/IEC and the IAU). The intention is that units written to conform to this specification will likely also be parsable by other well-known parsers. To this end, we include machine-readable grammars for other units syntaxes. Status of this…