doc: 2 more internal references

diff --git a/examples/s4u/README.rst b/examples/s4u/README.rst
index 8fce725..1fab295 100644 (file)
--- a/examples/s4u/README.rst
+++ b/examples/s4u/README.rst
@@ -80,6 +80,10 @@ Starting and Stoping Actors
 Inter-Actors Interactions
 -------------------------
 
+See also the examples on :ref:`inter-actors communications
+<s4u_ex_communication>` and the ones on :ref:`classical
+synchronization objects <s4u_ex_IPC>`.
+
   - **Suspend and Resume actors:**    
     Actors can be suspended and resumed during their executions.
     
@@ -149,6 +153,8 @@ also the tesh files in the example directories for details.
 Activities: what Actors do
 ==========================
 
+.. _s4u_ex_communication:
+
 Communications on the Network
 -----------------------------
 
@@ -256,6 +262,8 @@ result in short reads and short write, as in reality.
     i.e. when the accessed disk is not mounted on the caller's host.
     |br| `examples/s4u/io-file-remote/s4u-io-file-remote.cpp  <https://framagit.org/simgrid/simgrid/tree/master/examples/s4u/io-file-remote/s4u-io-file-remote.cpp>`_
 
+.. _s4u_ex_IPC:
+
 Classical synchronization objects
 ---------------------------------