Further thoughts on a focusing property of the ellipse.
Wilker, J.B.
Bulletin of the Belgian Mathematical Society - Simon Stevin, Tome 2 (1995), p. 153-159 / Harvested from The Electronic Library of Mathematics
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Publié le : 1995-01-01
EUDML-ID : urn:eudml:doc:231851 
@article{00757751,
     title = {Further thoughts on a focusing property of the ellipse.},
     journal = {Bulletin of the Belgian Mathematical Society - Simon Stevin},
     volume = {2},
     year = {1995},
     pages = {153-159},
     zbl = {0824.51017},
     language = {en},
     url = {http://dml.mathdoc.fr/item/00757751}
}

Wilker, J.B. Further thoughts on a focusing property of the ellipse.. Bulletin of the Belgian Mathematical Society - Simon Stevin, Tome 2 (1995) pp. 153-159. http://gdmltest.u-ga.fr/item/00757751/