@article{GDZPPN002231034,
title = {Comparison Theory for Riccati equations.},
journal = {Manuscripta mathematica},
volume = {67},
year = {1990},
pages = {209-214},
zbl = {0714.53029},
url = {http://dml.mathdoc.fr/item/GDZPPN002231034}
}
Heintze, E.; Eschenburg, J.-H. Comparison Theory for Riccati equations.. Manuscripta mathematica, Tome 67 (1990) pp. 209-214. http://gdmltest.u-ga.fr/item/GDZPPN002231034/