Functional vs Non-Functional Testing. Two umbrella terms include a large variety of different test types that cover functional and non-functional aspects.
Top 10 Non functional Testing Tools, Pros and Cons
Non-Functional Testing - Code with MMAK
FUNCTIONAL TESTING VS NON-FUNCTIONAL TESTING
Testing as a Service: A Better Way to Test Applications
Non-functional testing mechanism of analyzing aspects of an application
Functional vs Non-Functional Testing - Indium
What is non-functional testing? Objectives, Benefits and Types
How do you define functional testing with two popular and seemingly contradictory explanations? - Stack Overflow
Key Difference between Functional and Non Functional Testing
Functional and Non-Functional Testing: Differences