@article{01332352,
title = {A Picone type identity for second-order half-linear differential equations.},
journal = {Acta Mathematica Universitatis Comenianae. New Series},
volume = {68},
year = {1999},
pages = {137-151},
zbl = {0926.34023},
language = {en},
url = {http://dml.mathdoc.fr/item/01332352}
}
Jaroš, J.; Kusano, T. A Picone type identity for second-order half-linear differential equations.. Acta Mathematica Universitatis Comenianae. New Series, Tome 68 (1999) pp. 137-151. http://gdmltest.u-ga.fr/item/01332352/