2020 Russian constitutional referendum
<a href="https://en.wikipedia.org/wiki/%D0%9C%D0%B0%D1%80%D0%BA%D0%B0_(%D0%B0%D0%BA%D1%86%D0%B8%D0%BE%D0%BD%D0%B5%D1%80%D0%BD%D0%BE%D0%B5_%D0%BE%D0%B1%D1%89%D0%B5%D1%81%D1%82%D0%B2%D0%BE)" class="extiw" title="w:Марка (акционерное общество)">RusMarka</a>
<a rel="nofollow" class="external autonumber" href="https://colnect.com/en/stamps/stamp/968966-Referendum_on_Constitutional_Amendments_2020-Russia">[1]</a>