@article{ELMA_1982__37_141278,
     author = {Peter Bundschuh},
     title = {\"Uber den {Rang} gewisser zirkulanter {Matrizen} (zu {Problem} {764A).}},
     journal = {Elemente der Mathematik},
     pages = {16--21},
     publisher = {mathdoc},
     volume = {37},
     year = {1982},
     zbl = {0468.10007},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1982__37_141278/}
}