1. Abramowitz, M., Stegun, I.A.: Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables. National Bureau of Standards, Washington, DC, USA (1972)
2. Banerjee, S., Carlin, B.P., Gelfand, A.E.: Hierarchical Modeling and Analysis for Spatial Data, 2nd edn. CRC Press, Boca Raton, FL, USA (2014)
3. Besag, J.: Spatial interaction and the statistical analysis of lattice systems. J. R. Stat. Soc. Ser. B Methodol. 36(2), 192–236 (1974)
4. Besag, J.: Statistical analysis of non-lattice data. The Statistician 24(3), 179–195 (1975)
5. Besag, J., Kooperberg, C.: On conditional and intrinsic autoregressions. Biometrika 82(4), 733–746 (1995)