Harmonic mean - Wikipedia

Intuition of the Arithmetic, Geometric and Harmonic Mean, by Andy Chen

Variance - Wikipedia

Pythagorean means - Wikipedia

Intuition of the Arithmetic, Geometric and Harmonic Mean, by Andy Chen

Is there a shorter name for the reciprocal of the sum of reciprocals of a list of numbers? - Quora

Harmonic - Wikipedia

Harmonic distribution - Wikipedia

Quantum harmonic oscillator - Wikipedia

Two numbers have a harmonic mean of 16 and arithmetic mean of 4. What is the geometric mean? - Quora

Arithmetic–geometric mean - Wikipedia

On Average, You're Using the Wrong Average: Geometric & Harmonic Means in Data Analysis

On Average, You're Using the Wrong Average — Part II, by Daniel McNichol

Arithmetic–geometric mean - Wikipedia