When browsing the results clicking “Actions” then “Cite” on a result opens a dialog from which, supposedly, shows the citation of that result in different formats. However, right now (for me) this dialog is not displaying anything. Looking in the developer tools, requests like the following are made:
https://0-search-crossref-org.library.alliant.edu/citation?format=bibtex&doi=10.1016%2Fs0006-3495(68)86510-5
These requests succeed according to the HTTP status but do not return anything.