Infinite number of spheres through four tangents. (Unendlich viele Kugeln durch vier Tangenten.)
Stachel, Hellmuth
Mathematica Pannonica, Tome 6 (1995), p. 55-66 / Harvested from The Electronic Library of Mathematics
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Publié le : 1995-01-01
EUDML-ID : urn:eudml:doc:232854 
@article{00778318,
     title = {Infinite number of spheres through four tangents. (Unendlich viele Kugeln durch vier Tangenten.)},
     journal = {Mathematica Pannonica},
     volume = {6},
     year = {1995},
     pages = {55-66},
     zbl = {0828.51008},
     language = {en},
     url = {http://dml.mathdoc.fr/item/00778318}
}

Stachel, Hellmuth. Infinite number of spheres through four tangents. (Unendlich viele Kugeln durch vier Tangenten.). Mathematica Pannonica, Tome 6 (1995) pp. 55-66. http://gdmltest.u-ga.fr/item/00778318/