@article{PagelAndersonCrameretal.2014,
  author    = {J{\"o}rn Pagel and Barbara J. Anderson and Wolfgang Cramer and Richard Fox and Florian Jeltsch and David B. Roy and Chris D. Thomas and Frank Martin Schurr},
  title     = {Quantifying range-wide variation in population trends from local abundance surveys and widespread opportunistic occurrence records},
  journal   = {Methods in ecology and evolution : an official journal of the British Ecological Society},
  volume    = {5},
  number    = {8},
  pages     = {751 -- 760},
  doi       = {10.1111/2041-210X.12221},
  year      = {2014},
}