To cite prevR package:

Larmarange Joseph, Vallo Roselyne, Yaro Seydou, Msellati Philippe and Meda Nicolas (2011) 'Methods for mapping regional trends of HIV prevalence from Demographic and Health Surveys (DHS)', Cybergeo : European Journal of Geography, no 558, http://cybergeo.revues.org/24606, doi:10.4000/cybergeo.24606.

Corresponding BibTeX entry:

  @Article{,
    title = {Methods for mapping regional trends of HIV prevalence from
      Demographic and Health Surveys (DHS)},
    author = {Joseph Larmarange and Roselyne Vallo and Seydou Yaro and
      Philippe Msellati and Nicolas Meda},
    journal = {Cybergeo: European Journal of Geography},
    year = {2011},
    number = {558},
    url = {http://cybergeo.revues.org/24606},
    doi = {10.4000/cybergeo.24606},
  }