The paper “Double copy from homotopy algebras“, with co-authors Leron Borsten (Heriot-Watt), Hyungrok Kim (Heriot Watt), Branislav Jurčo (Charles University Prague), Tommaso Macrelli, Christian Saemann (Heriot-Watt), and Martin Wolf, published by Fortschritte der Physik in August 2021, has been recognised by the journal as “top-cited paper in the field”. The paper is 100 pages long and is available open access (link here). The image below shows Figure 1 from the paper.