1 Retraction note
The Editors-in-Chief have retracted this article [1] because it significantly overlaps with an article by different authors [2] that was simultaneously under consideration at another journal. The article also showed evidence of authorship manipulation. In addition, the identity of the corresponding author could not be verified: Hasselt University have confirmed that Costanza T Viouonu has not been affiliated with their institution. The authors have not responded to any correspondence about this retraction.
References
Xie, X., Viouonu, C.T.: Bound. Value Probl. 2016, 136 (2016). https://doi.org/10.1186/s13661-016-0642-3
Huang, B., Wang, J., Zylbersztejn, M.H.: An extension of the estimation for solutions of certain Laplace equations. J. Inequal. Appl. 2016, 167 (2016). https://doi.org/10.1186/s13660-016-1109-x
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Xie, X., Viouonu, C.T. Retraction Note: Some new results on the boundary behaviors of harmonic functions with integral boundary conditions. Bound Value Probl 2020, 25 (2020). https://doi.org/10.1186/s13661-020-01337-0
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DOI: https://doi.org/10.1186/s13661-020-01337-0