SALEH, Ahlam A.; RATAJESKI, Melissa A.; BERTOLET, Marnie. Grey Literature Searching for Health Sciences Systematic Reviews: A Prospective Study of Time Spent and Resources Utilized. Evidence Based Library and Information Practice, [S. l.], v. 9, n. 3, p. 28–50, 2014. DOI: 10.18438/B8DW3K. Disponível em: https://journals.library.ualberta.ca/eblip/index.php/EBLIP/article/view/20629. Acesso em: 3 feb. 2025.