%0 Journal Article %A A. Jalali-Naini %A A.J. Watkins %T On a Class of Three Dimensional Radially Symmetric Positive Definite Functions. %J Metrika %D 1989 %P 327-330 %V 36 %N 3-4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MET_1989__36_3-4_176253/ %F MET_1989__36_3-4_176253