1. Michael Armbrust, et al., Above the Clouds: A Berkeley View of Cloud Computing, Technical Report No. UCB/EECS-2009-28.
2. IPIP NET, https://en.ipip.net/.
3. Cloud Computing Market By Service and Geography—Forecast and Analysis 2021–2025;Maida,2021
4. Amazon EC2 Pricing, http://aws.amazon.com/ec2/pricing/.
5. Aliyun Pricing, https://www.alibabacloud.com/pricing.