On generalized ellipses
Hartman, Philip ; Valentine, Frederick A.
Duke Math. J., Tome 26 (1959) no. 1, p. 373-385 / Harvested from Project Euclid
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Publié le : 1959-09-14
Classification:  52.00 
@article{1077468607,
     author = {Hartman, Philip and Valentine, Frederick A.},
     title = {On generalized ellipses},
     journal = {Duke Math. J.},
     volume = {26},
     number = {1},
     year = {1959},
     pages = { 373-385},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1077468607}
}

Hartman, Philip; Valentine, Frederick A. On generalized ellipses. Duke Math. J., Tome 26 (1959) no. 1, pp.  373-385. http://gdmltest.u-ga.fr/item/1077468607/