Update publications.md

mission/publications.md

@@ -9,8 +9,10 @@ excerpt:
 
 #### Technical and Administrative Documentation, Policies
 * [Helmholtz AAI Policies](https://hifis.net/policies)
-* [HIFIS Documentation for architectural components and processes](https://www.hifis.net/doc/)
+* [Helmholtz centres connected to the Helmholtz AAI](https://hifis.net/doc/backbone-aai/list-of-connected-centers/)
 * Selected Services for [Initial Helmholtz Cloud Service Portfolio](https://www.hifis.net/doc/service-portfolio/initial-service-portfolio/how-services-are-selected/#selected-services-for-initial-helmholtz-cloud-service-portfolio), *2020-10-06* 
+* [All HIFIS Documentation for architectural components and processes](https://www.hifis.net/doc/)
+
 
 #### Abstracts, Presentations, News
 * HIFIS at [EGI conference](https://indico.egi.eu/event/5000/overview) (2-5 November 2020):