"Βιογραφικό - Κόκκας, Λεωνίδας" [Biography - Kokkas, Leonidas]. weightlifting.gr (in Greek). Hellenic Weightlifting Federation. Archived from the original on 6 December 2013.
weightlifting.gr
"Βιογραφικό - Κόκκας, Λεωνίδας" [Biography - Kokkas, Leonidas]. weightlifting.gr (in Greek). Hellenic Weightlifting Federation. Archived from the original on 6 December 2013.