referendum
... that the Serbs of Kosovo held a non-binding referendum in which they rejected the Republic of Kosovo's authority in north Kosovo?
... that the <a class="mw-redirect" href="./Serbs_of_Kosovo" id="mwBh4" rel="mw:WikiLink" title="Serbs of Kosovo">Serbs of Kosovo</a> held a non-binding <b id="mwBh8"><a class="mw-redirect" href="./North_Kosovo_referendum,_2012" id="mwBiA" rel="mw:WikiLink" title="North Kosovo referendum, 2012">referendum</a></b> in which they rejected the <a class="mw-redirect" href="./Republic_of_Kosovo" id="mwBiE" rel="mw:WikiLink" title="Republic of Kosovo">Republic of Kosovo</a>'s authority in <a href="./North_Kosovo" id="mwBiI" rel="mw:WikiLink" title="North Kosovo">north Kosovo</a>?