Phys. Rev. Lett. 63, 1046–1049 (1989)New proposal for closed-string field theory: The free-string caseReceived 25 May 1989; published in the issue dated 4 September 1989 A novel form of the free-string field action is proposed for both the closed bosonic string and the heterotic string. © 1989 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.63.1046
DOI:
10.1103/PhysRevLett.63.1046
PACS:
11.17.+y
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