Kamenev-type oscillation criteria for even order neutral differential equations with deviating arguments

Sufficient conditions are established for the oscillation of even order neutral differential equations of the formx(t)+∑i=1mpi(t)x(τi(t))(n)+∑j=1lqj(t)fj(x(σj(t)))=0,t⩾t0,where n ⩾ 2 is even integer.