To cite package ‘MRcML’ in publications use:

  Xue H, Shen X, Pan W (2024). _MRcML: Mendelian randomization method
  with constrained maximum likelihood._. R package version 0.0.0.9000,
  <https://github.com/xue-hr/mrcml>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {MRcML: Mendelian randomization method with constrained maximum
likelihood.},
    author = {Haoran Xue and Xiaotong Shen and Wei Pan},
    year = {2024},
    note = {R package version 0.0.0.9000},
    url = {https://github.com/xue-hr/mrcml},
  }