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).
@article{107549,
author = {Vojtech B\'alint and Philippe Lauron},
title = {Improvement of inequalities for the $(r,q)$-structures and some geometrical connections},
journal = {Archivum Mathematicum},
volume = {031},
year = {1995},
pages = {283-289},
zbl = {0846.05012},
mrnumber = {1390587},
language = {en},
url = {http://dml.mathdoc.fr/item/107549}
}
Bálint, Vojtech; Lauron, Philippe. Improvement of inequalities for the $(r,q)$-structures and some geometrical connections. Archivum Mathematicum, Tome 031 (1995) pp. 283-289. http://gdmltest.u-ga.fr/item/107549/
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