diff --git a/ieeeSW/releaseEng3/IEEE_ThemeIssue_ReleaseEng_CD.md b/ieeeSW/releaseEng3/IEEE_ThemeIssue_ReleaseEng_CD.md
index 2fdf128..1137ae5 100644
--- a/ieeeSW/releaseEng3/IEEE_ThemeIssue_ReleaseEng_CD.md
+++ b/ieeeSW/releaseEng3/IEEE_ThemeIssue_ReleaseEng_CD.md
@@ -352,7 +352,7 @@ We thank our colleagues, Nelson Lago, Lucas Kanashiro and Rafael Manzo, and this
 
 1. G. Booch, A. W. Brown, "Collaborative Development Environments", in Advances in Computers, vol. 59, 2003, pp. 1–27.
 2. L. Chen, "Continuous Delivery: Huge Benefits, but Challenges Too", in IEEE Software, vol. 32, no. 2, 2015, pp. 50-54.
-3. REF system-of-system.
+3. ISO/IEC/IEEE International Standard - Systems and software engineering -- System life cycle processes," in ISO/IEC/IEEE 15288 First edition 2015-05-15, 2015, pp.1-118.
 4. Meirelles, P., Wen, M., Terceiro, A., Siqueira, R., Kanashiro, L., and Neri, H. 2017. Brazilian Public Software Portal: an integrated platform for collaborative development. In Proceedings of the 13th International Symposium on Open Collaboration (OpenSym '17). ACM, Article 16, 10 pages.
 5. Davis, Jennifer and Daniels, Katherine, Effective DevOps: building a culture of collaboration, affinity, and tooling at scale, 2016, " O'Reilly Media, Inc."
 6. Humble, J. and Farley, D., 2010. Continuous Delivery: Reliable Software Releases through Build, Test, and Deployment Automation (Adobe Reader). Pearson Education.
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