File:Papaioannou ioannis 20081119 olympiade dresden.jpg - Wikimedia Commons
The Bogo-Indian Defense — GM Ioannis Papaioannou
Introduction - Ioannis Papaioannou chess video | chess24.com
Ioannis Papaioannou player profile - ChessBase Players
From Greece with Love! - ChessBase India
Understanding The Catalan - GM Ioannis Papaioannou | iChess.NET Shop
Profile of Papaioannou, Ioannis | Chess ABC
From Greece with Love! - ChessBase India
GM Ioannis Papaioannou and FM Sotiris Logothetis – Chessdom
Ελληνική Σκακιστική Ομοσπονδία - Greek Chess Federation - Παίξε με τον Giannis Papaioannou ! Σήμερα προκριματικά για το αυριανό σιμουλτανέ, με bonus την συμμετοχή στις κληρώσεις της FIDE για 1.500 έπαθλα, με
Baku Chess Olympiad 2016 - Ioannis Papaioannou (Greece) Photo: David Llada - Chess & Photography | Facebook
Artemis Cup Leros 2013 – Ioannis Papaioannou takes the trophy – Chessdom