@article{MZ_1975__143_172220,
     author = {Robin E. Harte},
     title = {A {Problem} of {Mixed} {Interpolation.}},
     journal = {Mathematische Zeitschrift},
     pages = {149--154},
     year = {1975},
     volume = {143},
     zbl = {0288.47016},
     url = {http://geodesic.mathdoc.fr/item/MZ_1975__143_172220/}
}