To cite package ‘coxphSGD’ in publications use:

  Kosinski M (2017). _coxphSGD: Stochastic Gradient Descent
  log-Likelihood Estimation in Cox Proportional Hazards Model_. R
  package version 0.2.1, <https://github.com/marcinkosinski/coxphsgd>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {coxphSGD: Stochastic Gradient Descent log-Likelihood Estimation in Cox
Proportional Hazards Model},
    author = {Marcin Kosinski},
    year = {2017},
    note = {R package version 0.2.1},
    url = {https://github.com/marcinkosinski/coxphsgd},
  }