To cite simplexreg in publications use:

Peng Zhang, Zhenguo Qiu, Chengchun Shi (2016). simplexreg: An R Package for Regression Analysis of Proportional Data Using the Simplex Distribution. Journal of Statistical Software, 71(11), 1-21.<doi:10.18637/jss.v071.i11>

Corresponding BibTeX entry:

  @Article{,
    title = {{simplexreg}: An {R} Package for Regression Analysis of
      Proportional Data Using the Simplex Distribution},
    author = {Peng Zhang and Zhenguo Qiu and Chengchun Shi},
    journal = {Journal of Statistical Software},
    year = {2016},
    volume = {71},
    number = {11},
    pages = {1--21},
    doi = {10.18637/jss.v071.i11},
  }