To cite package 'qpgraph' in publications use:

  Castelo, R. and Roverato, A. A robust procedure for Gaussian
  graphical model search from microarray data with p larger than n. J
  Mach Learn Res, 7:2621-50, 2006.

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Robert Castelo and Alberto Roverato},
    title = {A robust procedure for Gaussian graphical model search from microarray data with p larger than n},
    journal = {J Mach Learn Res},
    year = {2006},
    volume = {7},
    pages = {2621-50},
  }

  Castelo, R. and Roverato, A. Reverse engineering molecular regulatory
  networks from microarray data with qp-graphs J Comput Biol,
  16(2):213-27, 2009.

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Robert Castelo and Alberto Roverato},
    title = {Reverse engineering molecular regulatory networks from microarray data with qp-graphs},
    journal = {J Comput Biol},
    year = {2009},
    volume = {16},
    number = {2},
    pages = {213-27},
  }

  Tur, I., Roverato, A. and Castelo, R. Mapping eQTL networks with
  mixed graphical Markov models Genetics, 198(4):1377-93, 2014.

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Inma Tur and Alberto Roverato and Robert Castelo},
    title = {Mapping eQTL networks with mixed graphical Markov models},
    journal = {Genetics},
    year = {2014},
    volume = {198},
    number = {4},
    pages = {1377-93},
  }

Robert Castelo

  Roverato, A. and Castelo R. The networked partial correlation and its
  application to the analysis of genetic interactions. J R Stat Soc Ser
  C-Appl Stat, 66:647-65, 2017.

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Alberto Roverato},
    title = {The networked partial correlation and its application to the analysis of genetic interactions},
    journal = {J R Stat Soc Ser C-Appl Stat},
    year = {2017},
    volume = {66},
    pages = {647-65},
  }