Ehrenfest Theorem

Recommended

A. Messiah. Quantum Mechanics: Two Volumes Bound as One; Dover Publications, Inc: Garden City, New York, 2020.

Chapters 5, 6 discusses commutators and Ehrenfest's equation.

Wheeler, N. Remarks Concerning the Status & Some Ramifications of Ehrenfest’s Theorem, 1998. PDF (accessed 2024-10-03).

Another surprisingly thorough note from Nicholas Wheeler from Reed College (Yes, Griffiths is from Reed, too).