@article{GDZPPN002073080,
title = {The Osculating Conics of Steiner`s Hypocycloid.},
journal = {Elemente der Mathematik},
volume = {6},
year = {1951},
pages = {29-30},
zbl = {0042.40201},
url = {http://dml.mathdoc.fr/item/GDZPPN002073080}
}
Fabricius-Bjerre, Fr. The Osculating Conics of Steiner`s Hypocycloid.. Elemente der Mathematik, Tome 6 (1951) pp. 29-30. http://gdmltest.u-ga.fr/item/GDZPPN002073080/