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Access to Communications in Mathematical Physics, Nuclear Physics, Physical Review and other APS journals, and Zeitschrift fur Physik servers is limited to subscribers of the journals. If you cannot reach the servers, please find more details on how to enable the access here:
access to Commun. Math. Phys.
access to Nucl. Phys.
access to Phys. Rev. and Phys. Rev. Lett.
access to Z. Phys. and Europ. Phys. J.