To cite coga in publications use:

Hu C, Pozdnyakov V, Yan J (2019). coga: Convolution of Gamma Distributions. R package version 1.1.0, https://github.com/ChaoranHu/coga.

Hu C, Pozdnyakov V, Yan J (2019). “Density and Distribution Evaluation for Convolution of Independent Gamma Variables.” Computational Statistics. doi: 10.1007/s00180-019-00924-9.

Corresponding BibTeX entries:

  @Manual{,
    title = {{coga}: Convolution of Gamma Distributions},
    author = {Chaoran Hu and Vladimir Pozdnyakov and Jun Yan},
    note = {R package version 1.1.0},
    year = {2019},
    url = {https://github.com/ChaoranHu/coga},
  }

  @Article{,
    title = {Density and Distribution Evaluation for Convolution of
      Independent Gamma Variables},
    author = {Chaoran Hu and Vladimir Pozdnyakov and Jun Yan},
    journal = {Computational Statistics},
    year = {2019},
    doi = {10.1007/s00180-019-00924-9},
  }