References¶
[Tob79]
Waldo R Tobler. Smooth pycnophylactic interpolation for geographical regions. Journal of the American Statistical Association, 74(367):519–529, sep 1979. URL: http://www.tandfonline.com/doi/abs/10.1080/01621459.1979.10481647, doi:10.1080/01621459.1979.10481647.