Geodesic
Classification of $Aff(2,\mathbb R)$-orbit's dimensions for quadratic differential system
Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 2 (2008), pp. 122-126 
N. Gherstega; V. Orlov. Classification of $Aff(2,\mathbb R)$-orbit's dimensions for quadratic differential system. Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 2 (2008), pp. 122-126. http://geodesic.mathdoc.fr/item/BASM_2008_2_a13/
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Voir la notice de l'article provenant de la source Math-Net.Ru

Affine invariant conditions for $Aff(2,\mathbb R)$-orbit's dimensions are defined for two-dimensional autonomous quadratic differential system.

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