Retraction notice to “Optimization of combustion, performance, and emission characteristics of a dual-fuel diesel engine powered with microalgae-based biodiesel/diesel blends and oxyhydrogen” [Fuel 326 (2022) 124987] (Fuel (2022) 326, (S0016236122018294), (10.1016/j.fuel.2022.124987))

An investigation identified violations of the journal's policies on authorship and conflict of interest related to the submission and review of this paper. Authorship changes were made during the final (2nd) revision of this paper; one author was removed, and the author Van Vang Le added to the final revised paper without validation or authorisation. This breached the journal's policy on authorship. In addition, acceptance of the article was partly based upon the positive advice of one reviewer who was linked with the handling editor Abdulaziz Atabani and four of the authors (Anh Tuan Hoang, Zuohua Huang, Xuan Phuong Nguyen, Dhinesh Balasubramanian); and also partly based upon the positive advice of a 2nd reviewer who was linked with three of the authors (Anh Tuan Hoang, Zuohua Huang, Xuan Phuong Nguyen). A number of these co-authored papers were under consideration at the same time as this paper was undergoing review for FUEL. This compromised the editorial process. The Corresponding (and other) Authors responded promptly to requests for clarification on these points, but those explanations did not satisfactorily address the concerns. As such and due to the nature of the irregularities uncovered, the Editor has lost confidence in the validity/integrity and findings of the article and decided to retract the article. The scientific community takes a very strong view on this matter and apologies are offered to readers. The Authors do not agree with the decision to retract the paper and dispute the grounds for it.