Source: /cirosantilli/student-friendly-quantum-field-theory-by-robert-d-klauber-2013

= Student Friendly Quantum Field Theory by Robert D Klauber (2013)

http://www.quantumfieldtheory.info/

https://www.quora.com/Whats-an-expert-opinion-on-Robert-Klaubers-Student-Friendly-Quantum-Field-Theory

https://www.amazon.co.uk/Student-Friendly-Quantum-Field-Theory/dp/0984513957