diff --git a/docs/pyboard/tutorial/switch.rst b/docs/pyboard/tutorial/switch.rst
index 759fea8ffef339d416b8336873583809c86d1090..945e89aa05a9ca30f7acceeec16c85065ad02a4e 100644
--- a/docs/pyboard/tutorial/switch.rst
+++ b/docs/pyboard/tutorial/switch.rst
@@ -99,3 +99,9 @@ The above sequence of events gets a bit more complicated when multiple
 interrupts occur at the same time.  In that case, the interrupt with the
 highest priority goes first, then the others in order of their priority.
 The switch interrupt is set at the lowest priority.
+
+Further reading
+---------------
+
+For further information about using hardware interrupts see
+:ref:`writing interrupt handlers <isr_rules>`.