To cite lgcp in publications use:

Benjamin M. Taylor, Tilman M. Davies, Barry S. Rowlingson, Peter J. Diggle (2013). lgcp: An R Package for Inference with Spatial and Spatio-Temporal Log-Gaussian Cox Processes. Journal of Statistical Software, 52(4), 1-40. URL http://www.jstatsoft.org/v52/i04/.

Corresponding BibTeX entry:

  @Article{,
    title = {{lgcp}: An {R} Package for Inference with Spatial and
      Spatio-Temporal Log-Gaussian Cox Processes},
    author = {Benjamin M. Taylor and Tilman M. Davies and Barry S.
      Rowlingson and Peter J. Diggle},
    journal = {Journal of Statistical Software},
    year = {2013},
    volume = {52},
    number = {4},
    pages = {1--40},
    url = {http://www.jstatsoft.org/v52/i04/},
  }