We investigate the oscillation of the following higher-order functional differential equation: where and are continuous functions on , and are constants. Unlike most of delay-dependent oscillation results in the literature, two delay-independent oscillation criteria for the equation are established in both the case and the case under the assumption that the potentials and change signs on .
Yuangong Sun. "On Delay-Independent Criteria for Oscillation of Higher-Order Functional Differential Equations." Abstr. Appl. Anal. 2011 1 - 6, 2011. https://doi.org/10.1155/2011/173158