1. IBM Cloud Educuation. 2018. Defining IaaS PaaS and SaaS. Retrieved September 1 2021 from https://www.ibm.com/uk-en/cloud/learn/iaas-paas-saas. IBM Cloud Educuation. 2018. Defining IaaS PaaS and SaaS. Retrieved September 1 2021 from https://www.ibm.com/uk-en/cloud/learn/iaas-paas-saas.
2. A view of cloud computing
3. Changjiang Jia , Yan Cai , Yuen Tak Yu, and T. H. Tse . 2016 . 5W+1H pattern: A perspective of systematic mapping studies and a case study on cloud software testing. J. Syst. Softw . 116, (2016), 206–219. DOI: https://doi.org/10.1016/j.jss.2015.01.058 10.1016/j.jss.2015.01.058 Changjiang Jia, Yan Cai, Yuen Tak Yu, and T. H. Tse. 2016. 5W+1H pattern: A perspective of systematic mapping studies and a case study on cloud software testing. J. Syst. Softw. 116, (2016), 206–219. DOI: https://doi.org/10.1016/j.jss.2015.01.058
4. Scalability analysis comparisons of cloud-based software services
5. Microsoft Azure Guide . 2021 . N-tier architecture style . Retrieved October 19, 2021 https://docs.microsoft.com/en-us/azure/architecture/guide/architectu styles/n-tier. Microsoft Azure Guide. 2021. N-tier architecture style. Retrieved October 19, 2021 https://docs.microsoft.com/en-us/azure/architecture/guide/architectu styles/n-tier.