1. Abramowitz, M., Stegun, I.A.: Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables. Dover Publications, New York (1972)
2. Alegria, A., Cuevas, F., Diggle, P., Porcu, E.: A family of covariance functions for random fields on spheres. CSGB Research Reports, Department of Mathematics, Aarhus University (2018)
3. Arafat, M., Gregori, P., Porcu, E.: Schoenberg coefficients and curvature at the origin of continuous isotropic definite kernels on the sphere (2018).
arXiv:1807.02363v1
4. Berry, A.C.: The accuracy of the Gaussian approximation to the sum of independent variates. Trans. Am. Math. Soc. 49(1), 122–136 (1941)
5. Chilès, J.-P., Delfiner, P.: Geostatistics: Modeling Spatial Uncertainty. John Wiley and Sons, New York (2012)