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M. A. Grado-Caffaro, M. Grado-Caffaro       A note on massless quantum free scalar fields with negative energy density       Adv. Studies Theor. Phys., Vol. 7, 2013, no. 9-12, 549-554       http://dx.doi.org/10.12988/astp.2013.13053
Copyright © 2013 M. A. Grado-Caffaro and M. Grado-Caffaro. This article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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