@article{MAN_1959__137_160686,
     author = {H. Cremer and F.H. EFFERTZ},
     title = {\"Uber die algebraischen {Kriterien} f\"ur die {Stabilit\"at} von {Regelungssystemen.}},
     journal = {Mathematische Annalen},
     pages = {328--350},
     publisher = {mathdoc},
     volume = {137},
     year = {1959},
     zbl = {0092.01604},
     url = {http://geodesic.mathdoc.fr/item/MAN_1959__137_160686/}
}