Broncano, Rina Marie C., et al. “Agile Scrum Techniques on Detailed Product Backlogs: Basis in the Development of Human Resource Management in Freight Services”. Ascendens Asia Singapore – Bestlink College of the Philippines Journal of Multidisciplinary Research, vol. 1, no. 1, Apr. 2019, https://ojs.aaresearchindex.com/index.php/aasgbcpjmra/article/view/2174.