@article{JRAM_1983__345_152574,
     author = {Robert Kaufman},
     title = {Riccati equations, zeroes and independece.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {63--68},
     publisher = {mathdoc},
     volume = {345},
     year = {1983},
     zbl = {0512.34023},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1983__345_152574/}
}