Reid S, Tibshirani R (2014). “Conditional Logistic Regression with m-to-n Matching and the L1 Penalty.” Journal of Statistical Software, 58(4), 1–24. https://www.jstatsoft.org.

Corresponding BibTeX entry:

  @Article{,
    title = {Conditional Logistic Regression with m-to-n Matching and
      the L1 Penalty},
    author = {Stephen Reid and Robert Tibshirani},
    journal = {Journal of Statistical Software},
    year = {2014},
    volume = {58},
    number = {4},
    pages = {1--24},
    url = {https://www.jstatsoft.org},
  }