Pedreira, Oscar, Delfina Ramos-Vidal, Alejandro Cortiñas, Miguel Luaces, and Angeles Saavedra-Places. “Development of Digital Libraries With Software Product Line Engineering”. Journal of Web Engineering 20, no. 07 (November 16, 2021): 2017–2058. Accessed May 5, 2026. https://journals.riverpublishers.com/index.php/JWE/article/view/6791.