@workingpaper{ABCDE,
title = {Testarbeit},
author = {John Doe},
editor = {Herr Ausgeber},
url = {undefined},
doi = {321654987},
isbn = {123456789},
year  = {2024},
date = {2024-01-16},
urldate = {2024-01-16},
issue = {42},
abstract = {Lorem Ipsum...},
howpublished = {einfach so},
note = {Das ist ein Test.},
keywords = {},
pubstate = {published},
tppubtype = {workingpaper}
}