1. Berezansky, L., Braverman, E.: On some constants for oscillation and stability of delay equations. Proc. Am. Math. Soc. 139(11), 4017–4026 (2011)
2. Braverman, E., Karpuz, B.: On oscillation of differential and difference equations with non-monotone delays. Appl. Math. Comput. 58, 766–775 (2011)
3. Chatzarakis, G.E.: Differential equations with non-monotone arguments: iterative Oscillation Results. J. Math. Comput. Sci. 6(5), 953–964 (2016)
4. Chatzarakis, G.E.: On oscillation of differential equations with non-monotone deviating arguments. Mediterr. J. Math. 14, 82 (2017). https://doi.org/10.1007/s00009-017-0883-0.2017
5. Chatzarakis, G.E., Purnaras, I.K., Stavroulakis, I.P.: Oscillation tests of differential equations with deviating arguments. Adv. Math. Sci. Appl. 27(1), 1–28 (2018)