M. P. Moklyachuk, “Robust interpolation of random fields homogeneous in time and isotropic on a sphere, which are observed with noise”, Ukr. Mat. Zhurn., vol. 47, no. 7, pp. 962–970, Jul. 1995, Accessed: Apr. 13, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5491