To cite package ‘ILSE’ in publications use:

  Liu W, Lin H, Lan W (2022). _ILSE: Linear Regression Based on 'ILSE'
  for Missing Data_. R package version 1.1.7,
  <https://github.com/feiyoung/ilse>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ILSE: Linear Regression Based on 'ILSE' for Missing Data},
    author = {Wei Liu and Huazhen Lin and Wei Lan},
    year = {2022},
    note = {R package version 1.1.7},
    url = {https://github.com/feiyoung/ilse},
  }