@incollection{Bracken13,
author = {Paul Bracken},
title = {The Schwinger Action Principle and Its Applications to Quantum Mechanics},
booktitle = {Advances in Quantum Mechanics},
publisher = {IntechOpen},
address = {Rijeka},
year = {2013},
editor = {Paul Bracken},
chapter = {8},
doi = {10.5772/53472},
url = {https://doi.org/10.5772/53472}
}