Grey matters: Ensuring management information is a part of the permanent evidence base by creating open grey literature principles. - Cadotte, Marc W.; Beyene, Menilek S.; Bowell, Matthew; Dalrymple, Sarah E.; Dechoum, Michele S.; Dooner, Philip; Douwes, Errol; Hails, Rosemary S.; Jones, Holly P.; King, Trinity; Kurle, Carolyn M.; Lyon, Lauren M.; et al. (Ecological Solutions & Evidence, 2025)