To cite bfast in publications use

Jan Verbesselt, Rob Hyndman, Glenn Newnham, Darius Culvenor (2010). Detecting Trend and Seasonal Changes in Satellite Image Time Series. Remote Sensing of Environment, 114(1), 106-115. doi:10.1016/j.rse.2009.08.014
Jan Verbesselt, Rob Hyndman, Achim Zeileis, Darius Culvenor (2010). Phenological Change Detection while Accounting for Abrupt and Gradual Trends in Satellite Image Time Series. Remote Sensing of Environment, 114(12), 2970 - 2980. doi:10.1016/j.rse.2010.08.003

If you use bfastmonitor() or bfastpp(), please cite:

Jan Verbesselt, Achim Zeileis, Martin Herold (2011). Near Real-Time Disturbance Detection in Terrestrial Ecosystems Using Satellite Image Time Series: Drought Detection in Somalia. Working Paper 2011-18. Working Papers in Economics and Statistics, Research Platform Empirical and Experimental Economics, Universitaet Innsbruck. URL http://EconPapers.RePEc.org/RePEc:inn:wpaper:2011-18

Corresponding BibTeX entries:

  @Article{,
    title = {Detecting Trend and Seasonal Changes in Satellite Image
      Time Series},
    author = {Jan Verbesselt and Rob Hyndman and Glenn Newnham and
      Darius Culvenor},
    journal = {Remote Sensing of Environment},
    year = {2010},
    volume = {114},
    number = {1},
    pages = {106--115},
    doi = {10.1016/j.rse.2009.08.014},
  }
  @Article{,
    title = {Phenological Change Detection while Accounting for Abrupt
      and Gradual Trends in Satellite Image Time Series},
    author = {Jan Verbesselt and Rob Hyndman and Achim Zeileis and
      Darius Culvenor},
    journal = {Remote Sensing of Environment},
    year = {2010},
    volume = {114},
    number = {12},
    pages = {2970--2980},
    doi = {10.1016/j.rse.2010.08.003},
  }
  @TechReport{,
    title = {Near Real-Time Disturbance Detection in Terrestrial
      Ecosystems Using Satellite Image Time Series: Drought Detection
      in {S}omalia},
    author = {Jan Verbesselt and Achim Zeileis and Martin Herold},
    institution = {Working Papers in Economics and Statistics, Research
      Platform Empirical and Experimental Economics, Universit\"at
      Innsbruck},
    year = {2011},
    type = {Working Paper},
    number = {2011-18},
    month = {June},
    url = {http://EconPapers.RePEc.org/RePEc:inn:wpaper:2011-18},
  }