@article{NUMA_1982__39_132790,
     author = {O. H\"ubner},
     title = {\"Uber die {Anzahl} der {L\"osungen} der diskreten {Theodorsen-Gleichung.}},
     journal = {Numerische Mathematik},
     pages = {195--204},
     year = {1982},
     volume = {39},
     zbl = {0496.30006},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1982__39_132790/}
}