1. How green are cloud patterns?
2. Apache commons collections. http://commons.apache.org/proper/commons-collections/source-repository.html. Apache commons collections. http://commons.apache.org/proper/commons-collections/source-repository.html.
3. Apache commons configuration. https://commons.apache.org/proper/commons-configuration/index.html. Apache commons configuration. https://commons.apache.org/proper/commons-configuration/index.html.
4. Commons math: The apache commons mathematics library. https://commons.apache.org/proper/commons-math/. Commons math: The apache commons mathematics library. https://commons.apache.org/proper/commons-math/.