@article{01279103,
title = {Solutions of nonhomogeneous linear differential equations with exceptionally few zeros.},
journal = {Annales Academiae Scientiarum Fennicae. Mathematica},
volume = {23},
year = {1998},
pages = {429-452},
zbl = {0923.34001},
language = {en},
url = {http://dml.mathdoc.fr/item/01279103}
}
Gundersen, Gary G.; Steinbart, Enid M.; Wang, Shupei. Solutions of nonhomogeneous linear differential equations with exceptionally few zeros.. Annales Academiae Scientiarum Fennicae. Mathematica, Tome 23 (1998) pp. 429-452. http://gdmltest.u-ga.fr/item/01279103/