@article{MZ_1976__151_172429,
     author = {Jens Fromm},
     title = {L1-Approximation to {Zero.}},
     journal = {Mathematische Zeitschrift},
     pages = {31--34},
     year = {1976},
     volume = {151},
     zbl = {0319.41029},
     url = {http://geodesic.mathdoc.fr/item/MZ_1976__151_172429/}
}