To cite package 'RCAL' in publications use:

Tan, Z. (2019). RCAL: Regularized calibrated estimation. R package version 1.0.

Corresponding BibTeX entry:

  @Manual{,
    title = {RCAL: Regularized calibrated estimation},
    author = {Zhiqiang Tan},
    year = {2019},
    note = {R package version 1.0},
  }