“…Di Biase [8], Di Biase-Stokolos-Svensson-Weiss [9]. Sjögren [39,40,41], Rönning [32,33,34], Katkovskaya-Krotov [22,26], Krotov [24,25], Brundin [6], Mizuta-Shimomura [29], Aikawa [3] studied fractional Poisson integrals with respect to the fractional power of the Poisson kernel and obtained some tangential convergence properties for such integrals. More precisely they considered the integrals Theorem C (see [39,32,33]).…”