To cite pcdreg, cite the paper for the method and the package for the software you ran. The paper is the more important of the two.

Sun D, Guo Y, Li Y, Tu W, Sun J (2024). “A robust approach for regression analysis of panel count data.” Bernoulli, 30(4), 3251–3275. doi:10.3150/23-BEJ1713.

Sun D (2026). pcdreg: Semiparametric Regression for Panel Count Data. R package version 0.1.0, https://github.com/dayusun/pcdreg.

Corresponding BibTeX entries:

  @Article{,
    title = {A robust approach for regression analysis of panel count
      data},
    author = {Dayu Sun and Yuanyuan Guo and Yang Li and Wanzhu Tu and
      Jianguo Sun},
    journal = {Bernoulli},
    year = {2024},
    volume = {30},
    number = {4},
    pages = {3251--3275},
    doi = {10.3150/23-BEJ1713},
  }

  @Manual{,
    title = {{pcdreg}: Semiparametric Regression for Panel Count Data},
    author = {Dayu Sun},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://github.com/dayusun/pcdreg},
  }