@article{10_4153_CMB_1970_045_3,
     author = {Heinig, H. P.},
     title = {On an {Interpolation} {Theorem} of {Zygmund} and {Koizumi}},
     journal = {Canadian mathematical bulletin},
     pages = {221--226},
     year = {1970},
     volume = {13},
     number = {2},
     doi = {10.4153/CMB-1970-045-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1970-045-3/}
}