Donbas region to hold referendum on joining Russia: Moscow-backed separatists

Ukraine: Russians Withdraw From Around Kharkiv, Batter East

EXPLAINER: What's behind referendums in occupied Ukraine?

Putin proclaims annexation of four Ukrainian regions - The Washington Post

War in Donbas - Wikipedia

Four Ukrainian regions controlled by Russian-backed separatists request referendum to join Russia - ABC News

Russo-Ukrainian War - Wikipedia

Russia confirms capture of key town in Donbas – DW – 05/28/2022

4 Ukrainian regions schedule votes this week to join Russia

Russia warns new Donbas conflict could 'destroy' Ukraine, NATO rebukes Moscow – Euractiv

4 Ukrainian separatist regions plan votes to join Russia

Occupied regions of Ukraine vote to join Russia in staged referendums : NPR