David Tong -- What is Quantum Field Theory?

David Tong: Cambridge Lecture Notes on Theoretical Physics

What is the reason that classical field theory is not used or taught as much as quantum field theory, even though the two have many similarities and classical field theory was developed

Quantum Field Theory - David Tong

What is the reason that classical field theory is not used or taught as much as quantum field theory, even though the two have many similarities and classical field theory was developed

David Tong: Quantum Field Theory

Quantum Field Theory - David Tong

homework and exercises - Proof of causality in free scalar field

What is difference between classical theory and quantum theory of electron? - Quora

What is the difference between classical energy and quantum energy? - Quora

David Tong -- Video Lectures on Quantum Field Theory -- University

Download Quantum Field Theory [Lect. Notes, Cambridge Univ.] PDF

David Tong -- Video Lectures on Quantum Field Theory -- University

Quantum Field Theory, 2nd Edition

Quantum Field Theory Iii: Gauge Theory - By Eberhard Zeidler (hardcover) : Target

Quantum zeta epiphany: Physicist finds a new approach to a $1 million mathematical enigma

Quantum Field Theory and the Standard Model

Quantum Field Theory Explained— Understanding the Most Successful