Letelier, Patricio S.Verdaguer Oms, Enric, 1950-2010-05-062010-05-0619870556-2821https://hdl.handle.net/2445/12404The scalar sector of the effective low-energy six-dimensional Kaluza-Klein theory is seen to represent an anisotropic fluid composed of two perfect fluids if the extra space metric has a Euclidean signature, or a perfect fluid of geometric strings if it has an indefinite signature. The Einstein field equations with such fluids can be explicitly integrated when the four-dimensional space-time has two commuting Killing vectors.5 p.application/pdfeng(c) The American Physical Society, 1987Relativitat (Física)GravitacióTeoria de camps (Física)Teoria de Kaluza-KleinRelativity (Physics)GravitationField theory (Physics)Kaluza-Klein theoriesinfo:eu-repo/semantics/article79602info:eu-repo/semantics/openAccess