Analysis of information sources in references of the Wikipedia article "Next-to-Minimal Supersymmetric Standard Model" in English language version.
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(help) Translated in Zel'Dovich, Ya. B.; Kobzarev, I. Yu.; Okun', L. B. (1977). "Cosmological consequences of a spontaneous breakdown of a discrete symmetry". Soviet Physics JETP. 40: 1. Bibcode:1975JETP...40....1Z.