VeselovskaG., and HolubA. P. “Existence Theorems for Multidimensional Generalized moment representations”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 69, no. 4, Apr. 2017, pp. 456-65, http://umj.imath.kiev.ua/index.php/umj/article/view/1709.