1.
O(4) Symmetry of the Hydrogen Atom and the Lamb Shift
Michael Lieber
Phys. Rev. 174, 2037–2054 (1968)
- DOI:
http://dx.doi.org/10.1103/PhysRev.174.2037
O(4) Symmetry and the Forward Photoproduction of Pions at High Energies
P. K. Mitter
Phys. Rev. 162, 1624–1627 (1967)
- DOI:
http://dx.doi.org/10.1103/PhysRev.162.1624
The hidden SO(4) symmetry of general SU(2) thirring models
Giuseppe Curcia, Giampiero Paffuti and Paolo Rossi
Physics Letters B, Volume 215, Issue 2, 15 December 1988, Pages 349-351
- DOI:
http://dx.doi.org/10.1016/0370-2693(88)91446-3