olemus
= pärilikkuse liik, mille puhul klass või objekt saab olla mitme klassi või objekti pärija
= a type of inheritance where a class or an object can inherit from more than one parent class/object

ülevaateid
https://www.techopedia.com/definition/20883/multiple-inheritance

https://www.shiksha.com/online-courses/articles/difference-between-multilevel-and-multiple-inheritance-blogId-153359

https://en.wikipedia.org/wiki/Multiple_inheritance

https://advoop.sdds.ca/H-Deeper-Detail/multiple-inheritance

https://www.geeksforgeeks.org/java-and-multiple-inheritance/