Owing to the fact that a Living Reviews in Relativity article may evolve over time, we recommend to cite the article as follows:
Joan Simón,
"Brane Effective Actions, Kappa-Symmetry and Applications",
Living Rev. Relativity 15, (2012), 3. URL (accessed <date>):
http://www.livingreviews.org/lrr-2012-3
The date given as <date> then uniquely identifies the version of the article you are referring to.