DerievI. I. “Asymptotic Normality of Spherical Means of Nonlinear Functionals of Gaussian Random Fields”. Ukrains’kyi Matematychnyi Zhurnal 45, no. 4 (April 25, 1993): 472–480. Accessed September 1, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5834.