%0 Journal Article %A A. I. Bugrij %T Some properties of the double spectral function for dual amplitude with mandelstam analyticity %J Teoretičeskaâ i matematičeskaâ fizika %D 1973 %P 355-359 %V 16 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1973_16_3_a7/ %G ru %F TMF_1973_16_3_a7