Most of Germany forms the <i id="mwASE"><a href="https://en.wikipedia.org/wiki/Zollverein" id="mwASI" rel="mw:WikiLink" title="Zollverein">Zollverein</a></i> customs union, the first such union between sovereign states.<sup about="#mwt185" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-35"}}' id="cite_ref-35" rel="dc:references" typeof="mw:Extension/ref"><a href="./January_1#cite_note-35" id="mwASM" style="counter-reset: mw-Ref 35;"><span class="mw-reflink-text" id="mwASQ">[35]</span></a></sup>
<span class="mw-reference-text reference-text" id="mw-reference-text-cite_note-35"><cite about="#mwt182" class="citation web cs1" id="CITEREFPloeckl2019">Ploeckl, Florian (2019). <a class="external text" href="https://iit.adelaide.edu.au/system/files/media/documents/2019-11/Discussion%20Paper%202019-05%20Florian%20Ploeckl%20131119.pdf" id="mwDe4" rel="mw:ExtLink nofollow">"A Novel Institution: The Zollverein and the Origins of the Customs Union"</a> <span class="cs1-format" id="mwDe8">(PDF)</span>. <a class="external text" href="https://web.archive.org/web/20200307123334/https://iit.adelaide.edu.au/system/files/media/documents/2019-11/Discussion%20Paper%202019-05%20Florian%20Ploeckl%20131119.pdf" id="mwDfA" rel="mw:ExtLink nofollow">Archived</a> <span class="cs1-format" id="mwDfE">(PDF)</span> from the original on 2020-03-07<span class="reference-accessdate" id="mwDfI">. Retrieved <span class="nowrap" id="mwDfM">2020-10-04</span></span>.</cite><span about="#mwt182" class="Z3988" id="mwDfQ" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=A+Novel+Institution%3A+The+Zollverein+and+the+Origins+of+the+Customs+Union&amp;rft.date=2019&amp;rft.aulast=Ploeckl&amp;rft.aufirst=Florian&amp;rft_id=https%3A%2F%2Fiit.adelaide.edu.au%2Fsystem%2Ffiles%2Fmedia%2Fdocuments%2F2019-11%2FDiscussion%2520Paper%25202019-05%2520Florian%2520Ploeckl%2520131119.pdf&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AJanuary+1"></span></span>