@article{MZ_1973__133_171952,
     author = {Joachim R\"ohmel},
     title = {\"Uber die {Existenz} von {Indizenstrukturen} mit {Regularit\"atsbedingungen.}},
     journal = {Mathematische Zeitschrift},
     pages = {203--218},
     publisher = {mathdoc},
     volume = {133},
     year = {1973},
     zbl = {0269.05009},
     url = {http://geodesic.mathdoc.fr/item/MZ_1973__133_171952/}
}