## 5 Conclusions
(2021)_ _[PERSON]; [PERSON] Package \"Gstat\": Spatial and Spatio-Temporal Geostatistical Modelling, Prediction and Simulation. Available online: [[https://cran.r-project.org/web/packages/gstat/index.html](https://cran.r-project.org/web/packages/gstat/index.html)]([https://cran.r-project.org/web/packages/gstat/index.html](https://cran.r-project.org/web/packages/gstat/index.html)) (accessed on 27 February 2021)._
* _[PERSON] and [PERSON] (2008)_ _[PERSON]; [PERSON] An adaptive inverse-distance weighting spatial interpolation technique._ Comput. Gosci._ **2008**, _34_, 1044-1055. [CrossRef]
* _[PERSON] (2009)_ _[PERSON] Nonstationary models for exploring and mapping monthly precipitation in the United Kingdom._ Int. J. Climatol._ **2009**, _30_, 390-405. [CrossRef]
* _[PERSON] and Delfiner (1999)_ _[PERSON]; [PERSON]_ Geostatistics: Modeling Spatial Uncertainty_; John Wiley & Sons: New York, NY, USA, 1999; ISBN 9780471083153. * _[PERSON] (1991)_ _[PERSON] Geostatistical analysis of spatial data. In_ Spatial Statistics and Digital Image Analysis_; National Academy Press: Washington, DC, USA, 1991; pp. 87-108._
* _[PERSON] and Oliver (2007)_ _[PERSON]; [PERSON] Geostatistics for Environmental Scientists, 2 nd ed. ; Statistics in Practice; John Wiley & Sons, Ltd.: Chichester, UK, 2007; ISBN 9780470517277._
* _[PERSON] (1963)_ _[PERSON] Principles of geostatistics._ _Econ. Geol._ **1963**, _58_, 1246-1266. [CrossRef]
* _[PERSON] et al. (2017)_ _[PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON] [PERSON] A multivariate approach to study the geochemistry of urban topsoil in the city of Tampere._ Finland._ J. Geochem. Explor._ **2017**, _181_, 191-204. [CrossRef]
* _[PERSON] et al. (2017)_ _[PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON] [PERSON] Soil-gas radon anomalies in three study areas of Central-Northern Calabria (Southern Italy)._ Nat. Hazards_ **2017**, _91_, 193-219. [CrossRef]
* _[PERSON] et al. (2016)_ _[PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON] Modelling seasonal variations of natural radioactivity in soils: A case study in southern Italy._ J. Earth Syst. Sci._ **2016**, _125_, 1569-1578. [CrossRef]* [PERSON] et al. (2007) [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON] Comparison of interpolation methods for mapping climatic and bioclinatic variables at regional scale. _Int. J. Climatol._**2007**, _27_, 1825-1843. [CrossRef]
* [PERSON] et al. (2009) [PERSON]; [PERSON]; [PERSON] Analysis of historical changes in rainfall in the Indian Himalayas. _Int. J. Climatol._**2009**, _29_, 555-572. [CrossRef]
* [PERSON] (2005) [PERSON] Assessing the effect of integrating elevation data into the estimation of monthly precipitation in Great Britain. _J. Hydrol._**2005**, _308_, 128-150. [CrossRef]
* [PERSON] et al. (2007) [PERSON]; [PERSON]; [PERSON] Application and comparing of IDW and Kriging interpolation in spatial rainfall information. In Proceedings of the Geoinformatics 2007: Geospatial Information Science, Nanjing, China, 25-27 May 2007. * [PERSON] and [PERSON] (2012) [PERSON]; [PERSON] Estimation of the spatial rainfall distribution using inverse distance weighting (IDW) in the middle of Taiwan. _Paddy Water Environ._**2012**, _10_, 209-222. [CrossRef]
* [PERSON] et al. (2001) [PERSON]; [PERSON]; [PERSON] Geostatistical Mapping of Precipitation from Rain Gauge Data Using Atmospheric and Terrain Characteristics. _J. Appl. Meteorol._**2001**, _40_, 1855-1877. [CrossRef]
* [PERSON] et al. (2007) [PERSON]; [PERSON]; [PERSON]; [PERSON] Rainfall interpolation using a remote sensing CCD data in a tropical basin--A GIS and geostatistical application. _Phys. Chem. Earth Parts A/B/C_**2007**, _32_, 976-983. [CrossRef]
* [PERSON] et al. (2019) [PERSON]; [PERSON]; [PERSON] [PERSON] The De Martonne aridity index in Calabria (Southern Italy). _J. Maps_**2019**, _15_, 788-796. [CrossRef]