@article{GDZPPN002475944,
title = {Some Boundedness and Unboundedness Results for the Equation x'' + a(t) x2 n-1 = 0.},
journal = {Monatshefte f\"ur Mathematik},
volume = {71},
year = {1967},
pages = {461-465},
zbl = {0155.13403},
url = {http://dml.mathdoc.fr/item/GDZPPN002475944}
}
Willett, D. Some Boundedness and Unboundedness Results for the Equation x'' + a(t) x2 n-1 = 0.. Monatshefte für Mathematik, Tome 71 (1967) pp. 461-465. http://gdmltest.u-ga.fr/item/GDZPPN002475944/