We obtain oscillation and nonoscillation criteria for solutions to four-dimensional advanced and delay systems of first-order dynamic equations on time scales. To establish oscillation criteria, we eliminate nonoscillatory solutions of the systems based on the sign of components of the solutions. Furthermore, some of our results are new in the discrete case.
"Oscillation and nonoscillation criteria for four-dimensional advanced and delay time-scale systems." Rocky Mountain J. Math. 50 (6) 1923 - 1934, December 2020. https://doi.org/10.1216/rmj.2020.50.1923