@inbook{af3fea9f891041ecb0e010be47bc6816,
title = "Effective Action",
abstract = "We consider four dimensional action reflecting the symmetry of the internal manifold. The observed four spacetime dimensions should be the effective ones, since string theory is defined in ten dimensions and the extra dimensions hide as small compact space.",
author = "Choi, {Kang Sin} and Kim, {Jihn E.}",
note = "Publisher Copyright: {\textcopyright} 2020, Springer Nature Switzerland AG.",
year = "2020",
doi = "10.1007/978-3-030-54005-0_11",
language = "English",
series = "Lecture Notes in Physics",
publisher = "Springer Science and Business Media Deutschland GmbH",
pages = "303--337",
booktitle = "Lecture Notes in Physics",
}