To cite hydroscoper in publications, please use:

  Vantas K., (2018). hydroscoper: R interface to the Greek National
  Data Bank for Hydrological and Meteorological Information. Journal of
  Open Source Software, 3(23), 625 DOI:10.21105/joss.00625

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Konstantinos Vantas},
    title = {{hydroscoper}: R interface to the Greek National Data Bank for Hydrological and Meteorological Information},
    doi = {10.21105/joss.00625},
    year = {2018},
    month = {mar},
    publisher = {The Open Journal},
    volume = {2},
    number = {23},
    journal = {The Journal of Open Source Software},
  }