there isn't enough information to tell what you are trying to do or if it is the right thing to do. I don't think that is how org-ref exports to HTML anymore, now it uses CSL. There is something like that syntax for bibtex-completion-display-formats. You should file an issue at https://github.com/jkitchin/org-ref/issues with a small example org-file, bibtex example, and configuration that reproduces your problem. On Thu, Mar 30, 2023 at 8:11 AM Ihor Radchenko wrote: > Uwe Brauer writes: > > > The following setting in my custom file > > ... > > ("book" . "${author}, /${title}/ (${year}), ${ISBN}, (pp. > ${pages}) ${address}: ${publisher}.") > > > > However when I want to export a book reference to HTML, the ISBN field > > is not inserted. > > > > Any idea what is wrong? > > Maybe it is case-sensitive. > > -- > Ihor Radchenko // yantar92, > Org mode contributor, > Learn more about Org mode at . > Support Org development at , > or support my work at > > -- John ----------------------------------- Professor John Kitchin (he/his) Doherty Hall A207F Department of Chemical Engineering Carnegie Mellon University Pittsburgh, PA 15213 412-268-7803 https://kitchingroup.cheme.cmu.edu https://pointbreezepubs.gumroad.com/ pycse bookstore