Retraction notice to “Fractional order adaptive robust formation control of multiple quad-rotor UAVs with parametric uncertainties and wind disturbances”. [Chin. J. Aeronaut. 35 (2022) 204–220, (S1000936121003745), (10.1016/j.cja.2021.10.012)]

https://www.elsevier.com/about/policies/article-withdrawal). This article has been retracted at the authors' request and approved by the Editor in Chief. In this article, authors proposed and analyzed novel fractional order controllers (original contribution of the authors) for UAVs swarm formation and for the numerical validations, a simulation test bench (originally designed by the same group of authors) was utilized. The test bench that was published in another article by the same group of authors (https://www.mdpi.com/1424-8220/21/7/2401), was not properly cited in the current article. As such the authors deem it necessary to have their article withdrawn in the current form. The authors apologize to the scientific community for any inconveniences or challenges resulting from the publication and withdrawal of this article.