REQUIREMENTS ENGINEERING CHALLENGES IN OPEN-SOURCE SOFTWARE DEVELOPMENT: A MULTIVOCAL LITERATURE REVIEW PROTOCOL WITH PRELIMINARY RESULTS. Kashf Journal of Multidisciplinary Research, [S. l.], v. 2, n. 03, p. 259–270, 2025. DOI: 10.71146/kjmr386. Disponível em: https://kjmr.com.pk/kjmr/article/view/386. Acesso em: 1 jun. 2026.