(EN) Wacław Jan Kroczek e Robert Young, Validation of 113-Year Old Israel Kristal as the World’s Oldest Man, su link.springer.com. URL consultato il 31 dicembre 2020. in Exceptional Lifespans, pp.285-295 (EN) Heiner Maier, Bernard Jeune, James W. Vaupel, Dmitri A. Jdanov, Vladimir M. Shkolnikov, Sigrid Gellers-Barkmann, Jutta Gampe, Francisco Villavicencio, José Manuel Aburto, Adam Lenart, Anders Stockmarr, Bert Kestenbaum, France Meslé, Jacques Vallin, Lasse Kaalby, Axel Skytthe, Karen Andersen-Ranberg, Nadine Ouellette, France Meslé, Jean-Marie Robine, Yasuhiko Saito, Futoshi Ishii, Wacław Jan Kroczek, Mélissa Beaudry-Godin, Robert Bourbeau, Bertrand Desjardins, Michel Poulain, Dany Chambre, Robert Douglas Young, Rosa Gómez-Redondo, Ramón Domènech, Yasuyuki Gondo, Nobuyoshi Hirose, Saori Yasumoto, Yoshiko Lily Ishioka, Hiroki Inagaki, Yukie Masui e Yasumichi Arai, Exceptional Lifespans, Springer, 2020, ISBN978-3-030-49969-3.