To cite twostageTE in publications use:

Shawn Mankad, George Michailidis, Moulinath Banerjee (2015). Threshold Value Estimation Using Adaptive Two-Stage Plans in R. Journal of Statistical Software, 67(3), 1-19. doi:10.18637/jss.v067.i03

Corresponding BibTeX entry:

  @Article{,
    title = {Threshold Value Estimation Using Adaptive Two-Stage Plans
      in {R}},
    author = {Shawn Mankad and George Michailidis and Moulinath
      Banerjee},
    journal = {Journal of Statistical Software},
    year = {2015},
    volume = {67},
    number = {3},
    pages = {1--19},
    doi = {10.18637/jss.v067.i03},
  }