To cite MODIStsp in publications use:

  L. Busetto, L. Ranghetti (2016) MODIStsp: An R package for automatic
  preprocessing of MODIS Land Products time series, Computers &
  Geosciences, Volume 97, Pages 40-48, ISSN 0098-3004,
  https://doi.org/10.1016/j.cageo.2016.08.020. URL
  https://github.com/ropensci/MODIStsp/.

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Lorenzo Busetto and Luigi Ranghetti},
    title = {MODIStsp: an R package for preprocessing of MODIS Land Products time series},
    journal = {Computers & Geosciences},
    year = {2016},
    volume = {97},
    pages = {40-48},
    issn = {0098-3004},
    doi = {10.1016/j.cageo.2016.08.020},
    url = {https://github.com/ropensci/MODIStsp},
  }