Oscillation theorems for second order nonlinear differential equations (Q5903595)

The authors investigate nonlinear differential equations of the form \[ (a(t)\psi (x(t))\dot x(t))\quad \dot {\;}+p(t)\dot x(t)+q(t)f(x(t))=0. \] They derive oscillation criteria, improving, generalizing and unifying results obtained by Belohorec, Bhatia, Kamenev, Kura, and Philos.