The Réseau National des Bibliothèques de Mathématiques (RNBM), France, is organizing the Journées de la Documentation Mathématique (Mathematical Documentation Days) from November 20 to 24, 2023, on the theme of preservation and persistent access to documentation for mathematical research. The presentation of Keepers Registry and the Submit.Retrieve.Reuse service is scheduled on November 21 at 16.00 CET. Presentations by ZBW – Leibniz Information Center for Economics and LOCKSS/CLOCKSS, two archiving agencies partnering with Keepers Registry, will follow. The full program is available here: https://www.cirm-math.fr/Schedule/screen_display.php?id_renc=2869.