Juan Manuel, thank you very much. This is both very useful and ever so simple! I did have to set org-export-allow-bind-keywords for this to work (in case others wonder why nothing seems to happen ;-)).
Thanks again, eric -- : Eric S Fraga via Emacs 28.0.50, Org release_9.4.6-628-g366444 : Latest paper written in org: https://arxiv.org/abs/2106.05096
