[1] Wiesendanger, C. (2013) Journal of Modern Physics, 4, 37.
http://dx.doi.org/10.4236/jmp.2013.48A006
[2] Wiesendanger, C. (2013) Journal of Modern Physics, 4, 133.
http://dx.doi.org/10.4236/jmp.2013.48A013
[3] Wiesendanger, C. (2014) Journal of Modern Physics, 5, 959.
http://dx.doi.org/10.4236/jmp.2014.510099
[4] Wiesendanger, C. (2013) Classical and Quantum Gravity, 30, Article ID: 075024.
http://dx.doi.org/10.1088/0264-9381/30/7/075024
[5] Wiesendanger, C. (2014) Journal of Modern Physics, 5, 948.
http://dx.doi.org/10.4236/jmp.2014.510098
[6] O’Raifeartaigh, L. (1986) Group Structure of Gauge Theories. Cambridge University Press, Cambridge.
[7] Itzykson, C. and Zuber, J.-B. (1985) Quantum Field Theory. McGraw-Hill, Singapore.
[8] Bjorken, J.D. and Drell, S.D. (1964) Relativistic Quantum Mechanics. Mc Graw-Hill, New York.
[9] Schiff, L.I. (1968) Quantum Mechanics. McGraw-Hill, Singapore.