- Retraction Note
- Open Access
Retraction Note: Landesman-Lazer type condition for second-order differential equations at resonance with impulsive effects
© Li and Zheng 2015
Received: 18 March 2015
Accepted: 19 March 2015
Published: 4 July 2015
The original article was published in Advances in Difference Equations 2014 2014:235
This article  has been retracted by Professor Ravi P Agarwal, Editor-in-Chief of Advances in Difference Equations.
Following publication of this article, it was brought to the attention of the editorial and publishing staff that this article has substantial overlap with an article by Jin Li, Jianlin Luo, and Zaihong Wang , published in November 2014 in Mathematical Modelling and Analysis.
This is a violation of publication ethics which, in accordance with the Committee on Publication Ethics guidelines, warrants a retraction of the article and a notice to this effect to be published in the journal.
Open Access This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.
- Li, J, Zheng, M: Landesman-Lazer type condition for second-order differential equations at resonance with impulsive effects. Adv. Differ. Equ. 2014, 235 (2014) MathSciNetView ArticleGoogle Scholar
- Li, J, Luo, J, Wang, Z: Periodic solutions of second order impulsive differential equations at resonance via variational approach. Math. Model. Anal. 19(5), 664-675 (2014) MathSciNetView ArticleGoogle Scholar