Morse, P. M., & Feshbach, H. (1981). Methods of theoretical physics, part 2: Chapters 9 to 13. McGraw-Hill ; Feshbach Publishing.

Morse, Philip M., and Herman Feshbach. Methods of Theoretical Physics, Part 2: Chapters 9 to 13. New York ; Minneapolis: McGraw-Hill ; Feshbach Publishing, 1981.

Morse, Philip M., and Herman Feshbach. Methods of Theoretical Physics, Part 2: Chapters 9 to 13. McGraw-Hill ; Feshbach Publishing, 1981.