Page Object Model Framework

https://www.seleniumeasy.com/selenium-tutorials/page-object-model-framework-introduction

http://www.guru99.com/page-object-model-pom-page-factory-in-selenium-ultimate-guide.html

https://www.toptal.com/selenium/test-automation-in-selenium-using-page-object-model-and-page-factory

https://www.seleniumeasy.com/selenium-tutorials/page-factory-pattern-in-selenium-webdriver

http://toolsqa.com/selenium-webdriver/page-object-pattern-model-page-factory/

https://solutionscafe.wordpress.com/2014/01/06/page-object-pattern/