Krūminienė, Ingrida, and Kęstutis Dučinskas. “Generalized Product-Sum Variogram Models of the Data of the Center of Marine Research”. Lietuvos matematikos rinkinys 44, no. spec. (December 17, 2004): 736–741. Accessed March 4, 2026. https://www.zurnalai.vu.lt/LMR/article/view/32245.