@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/}
}