@article{10_4064_sm_64_2_175_190,
     author = {Alberto Torchinsky},
     title = {The {K-functional} for rearrangement invariant spaces},
     journal = {Studia Mathematica},
     pages = {175--190},
     year = {1979},
     volume = {64},
     number = {2},
     doi = {10.4064/sm-64-2-175-190},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-64-2-175-190/}
}