- Sktóry klawiaturowe - https://resources.jetbrains.com/storage/products/intellij-idea/docs/IntelliJIDEA_ReferenceCard.pdf
- Szybki start dla IDEA - https://www.jetbrains.com/help/idea/getting-started.html
- Hello World w Java + IDEA - https://www.jetbrains.com/help/idea/creating-and-running-your-first-java-application.html
- Java API Friendly - https://docs.oracle.com/javase/9/docs/api/index.html?overview-summary.html
- Java API Latest - https://docs.oracle.com/en/java/javase/16/docs/api/index.html
- Dziedziczenie - opis na Wikipedia (teoria) - https://pl.wikipedia.org/wiki/Dziedziczenie_%28programowanie%29
- Dziedziczenie - tutorial od Oracle - https://docs.oracle.com/javase/tutorial/java/IandI/subclasses.html
- Apache Commons Math - http://commons.apache.org/proper/commons-math/javadocs/api-3.6.1/index.html
- Java FX - https://openjfx.io/javadoc/15/index.html?overview-summary.html