@article{GDZPPN002477009,
title = {Stability Properties of (r(t)u')' + a(t) f(u) g(u') = 0.},
journal = {Monatshefte f\"ur Mathematik},
volume = {74},
year = {1970},
pages = {211-222},
zbl = {0195.09804},
url = {http://dml.mathdoc.fr/item/GDZPPN002477009}
}
Burton, T.A.; Grimmer, R.C. Stability Properties of (r(t)u')' + a(t) f(u) g(u') = 0.. Monatshefte für Mathematik, Tome 74 (1970) pp. 211-222. http://gdmltest.u-ga.fr/item/GDZPPN002477009/