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@article{PORMA_1987__44_4_115597, author = {Capri, O.N. and Fava, N.A.}, title = {A generalization of {Yano's} extrapolation theorem}, journal = {Portugaliae mathematica}, pages = {371--378}, publisher = {mathdoc}, volume = {44}, number = {4}, year = {1987}, mrnumber = {0952787}, zbl = {0649.47051}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1987__44_4_115597/} }
Capri, O.N.; Fava, N.A. A generalization of Yano's extrapolation theorem. Portugaliae mathematica, Tome 44 (1987) no. 4, pp. 371-378. http://geodesic.mathdoc.fr/item/PORMA_1987__44_4_115597/