BabiluaP., NadarayaE., and SokhadzeG. A. “On a Measure of Integral Square Deviation With Generalized Weight for the Rosenblatt–Parzen Probability Density Estimator”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 62, no. 4, Apr. 2010, pp. 514–535, https://umj.imath.kiev.ua/index.php/umj/article/view/2885.