%0 Journal Article %A Kováčová, Monika %T Property $A$ of the $(n+1)^{th}$ order differential equation $\left [\frac 1{r_1(t)}\left (x^{(n)}(t)+p(t)x(t)\right )\right ]' = f(t,x(t),\cdots ,x^{(n)}(t))$ %J Archivum mathematicum %D 2000 %P 487-498 %V 36 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_2000__36_5_a15/ %G en %F ARM_2000__36_5_a15