(en) Florian Egger, Jürgen Scharhag, Andreas Kästner et Jiří Dvořák, « FIFA Sudden Death Registry (FIFA-SDR): a prospective, observational study of sudden death in worldwide football from 2014 to 2018 », British Journal of Sports Medicine, (ISSN0306-3674 et 1473-0480, PMID33361135, DOI10.1136/bjsports-2020-102368, lire en ligne, consulté le ).
(en) Florian Egger, Jürgen Scharhag, Andreas Kästner et Jiří Dvořák, « FIFA Sudden Death Registry (FIFA-SDR): a prospective, observational study of sudden death in worldwide football from 2014 to 2018 », British Journal of Sports Medicine, (ISSN0306-3674 et 1473-0480, PMID33361135, DOI10.1136/bjsports-2020-102368, lire en ligne, consulté le ).
(en) Tom Sheen, « Emanuel Ortega dead: 21-year-old footballer in Argentina's fifth tier dead after suffering horrific head injury after collision with concrete wall », The Independent, (lire en ligne, consulté le ).
(en) Florian Egger, Jürgen Scharhag, Andreas Kästner et Jiří Dvořák, « FIFA Sudden Death Registry (FIFA-SDR): a prospective, observational study of sudden death in worldwide football from 2014 to 2018 », British Journal of Sports Medicine, (ISSN0306-3674 et 1473-0480, PMID33361135, DOI10.1136/bjsports-2020-102368, lire en ligne, consulté le ).
(en) Florian Egger, Jürgen Scharhag, Andreas Kästner et Jiří Dvořák, « FIFA Sudden Death Registry (FIFA-SDR): a prospective, observational study of sudden death in worldwide football from 2014 to 2018 », British Journal of Sports Medicine, (ISSN0306-3674 et 1473-0480, PMID33361135, DOI10.1136/bjsports-2020-102368, lire en ligne, consulté le ).