To cite SvyNom in publications use:

Marinela Capanu, Mithat Gonen (2015). Building a Nomogram for Survey-Weighted Cox Models Using R. Journal of Statistical Software, Code Snippets, 64(1), 1-17. URL http://www.jstatsoft.org/v64/c01/.

Corresponding BibTeX entry:

  @Article{,
    title = {Building a Nomogram for Survey-Weighted {C}ox Models Using
      {R}},
    author = {Marinela Capanu and Mithat G{\"o}nen},
    journal = {Journal of Statistical Software, Code Snippets},
    year = {2015},
    volume = {64},
    number = {1},
    pages = {1--17},
    url = {http://www.jstatsoft.org/v64/c01/},
  }