To cite c060 in publications use:

Martin Sill, Thomas Hielscher, Natalia Becker, Manuela Zucknick (2014). c060: Extended Inference with Lasso and Elastic-Net Regularized Cox and Generalized Linear Models. Journal of Statistical Software, 62(5), 1-22. URL http://www.jstatsoft.org/v62/i05/.

Corresponding BibTeX entry:

  @Article{,
    title = {{c060}: Extended Inference with Lasso and Elastic-Net
      Regularized Cox and Generalized Linear Models},
    author = {Martin Sill and Thomas Hielscher and Natalia Becker and
      Manuela Zucknick},
    journal = {Journal of Statistical Software},
    year = {2014},
    volume = {62},
    number = {5},
    pages = {1--22},
    url = {http://www.jstatsoft.org/v62/i05/},
  }