To cite package ‘belex’ in publications use:

Vilotic M, Kovacic Z (2018). belex: Download Historical Data from the Belgrade Stock Exchange. R package version 0.1.0, https://github.com/milosvil/belex.

Corresponding BibTeX entry:

  @Manual{,
    title = {belex: Download Historical Data from the Belgrade Stock
      Exchange},
    author = {Milos Vilotic and Zlatko Kovacic},
    year = {2018},
    note = {R package version 0.1.0},
    url = {https://github.com/milosvil/belex},
  }