%0 Journal Article %A Ling Li %T Optimal integrability for some integral system of Wolff type %J Filomat %D 2021 %P 2951 %V 35 %N 9 %U http://geodesic.mathdoc.fr/articles/10.2298/FIL2109951L/ %R 10.2298/FIL2109951L %G en %F 10_2298_FIL2109951L