How does one go about finding an obscure journal and paper?
It's not a journal, it's a volume of proceedings from a conference (which you can derive from the format &quot;Proc. X Conf.&quot;).
It looks like these are proceedings from a conference held in Bucharest, Romania, in 2017. It may have been a local conference; online sources are very limited in English and slightly less limited in Romanian.
As Buffy suggested in the comments, your best bet is to ask your local academic librarian.