Serhii Plokhy.The Russo-Ukrainian War: From the bestselling author of Chernobyl. — Penguin Books Limited, 2023-05-16. — С. 68 - In September 2004, the fifty-year-old Yushchenko fell violently ill and was soon diagnosed with dioxin poisoning. The individuals suspected of arranging it had fled to Russia and were given safe haven there. Yushchenko miraculously survived the attack and managed to return to the electoral campaign defaced but alive. Instead of knocking Yushchenko out, the attack on the opposition candidate increased his popularity. When Ukrainians went to the polling stations on October 31, most of them voted for Yushchenko, not Yanukovych.. — 269 с. — ISBN 978-1-80206-179-6.
