A Multi-Tier Architecture for the Management of Supply Chain of Cloud Resources in a Virtualized Cloud Environment: A Novel SCM Technique for Cloud Resources Using Ant Colony Optimization and Spanning Tree. - Muhammad Aliyu; Murali M.; Abdulsalam Ya'u Gital; Souley Boukari; Rumana Kabir; Maryam Abdullahi Musa; Fatima Umar Zambuk; Joshua Caleb Shawulu; Ibrahim M. Umar (Int. J. Inf. Syst. Supply Chain Manag., 2021)