A relation between the numbers of singular points and singular lines of a plane closed curve.
Fabricius-Bjerre, Fr.
Mathematica Scandinavica, Tome 40 (1977), p. 20-24 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1977-01-01
EUDML-ID : urn:eudml:doc:166511 
@article{GDZPPN002354225,
     title = {A relation between the numbers of singular points and singular lines of a plane closed curve.},
     journal = {Mathematica Scandinavica},
     volume = {40},
     year = {1977},
     pages = {20-24},
     zbl = {0352.50011},
     url = {http://dml.mathdoc.fr/item/GDZPPN002354225}
}

Fabricius-Bjerre, Fr. A relation between the numbers of singular points and singular lines of a plane closed curve.. Mathematica Scandinavica, Tome 40 (1977) pp. 20-24. http://gdmltest.u-ga.fr/item/GDZPPN002354225/