How to export the reference list for a given paper using Google Scholar?

Weirdly, I don't think that Google Scholar provides that feature, even though they clearly parse and store this information internally. This does indeed sound like a nice feature to have access to.

Unfortunately, Google Scholar only provides the list of publications that cite a given reference.

However, if you have access to Web of Science, to look up a list of references cited in a given publication, you can use the "Cited References" tool.

Note that some journals are not indexed by Web of Science. In that case, you will need to look up the bibliography in the full text of the publication.