Geodesic
Improvement of inequalities for the $(r,q)$-structures and some geometrical connections
Archivum mathematicum, Tome 31 (1995) no. 4, pp. 283-289.

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The main results are the inequalities (1) and (6) for the minimal number of $(r,q)$-structure classes,which improve the ones from [3], and also some geometrical connections, especially the inequality (13).
Classification : 05B30, 51E30, 52C10
Keywords: structure; line; circle; horocycle 
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     title = {Improvement of inequalities for the $(r,q)$-structures and some geometrical connections},
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Bálint, Vojtech; Lauron, Philippe. Improvement of inequalities for the $(r,q)$-structures and some geometrical connections. Archivum mathematicum, Tome 31 (1995) no. 4, pp. 283-289. http://geodesic.mathdoc.fr/item/ARM_1995__31_4_a4/