diff --git a/src/TaskMachine/DateExpr.hs b/src/TaskMachine/DateExpr.hs
index a2e3926..ae9aed3 100644
--- a/src/TaskMachine/DateExpr.hs
+++ b/src/TaskMachine/DateExpr.hs
@@ -10,12 +10,15 @@
 -- 'Nothing' into 'False'.
 
 module TaskMachine.DateExpr
-  ( BoolExpr
+  (
+  -- * Boolean expressions
+    BoolExpr
   , parseBoolExpr
   , evalBoolExpr
   , evalBoolExpr'
   , findNext
   , findWithin
+  -- * Integer expressions
   , IntExpr
   , parseIntExpr
   , evalIntExpr
diff --git a/src/TaskMachine/Deadline.hs b/src/TaskMachine/Deadline.hs
index b6190e8..cbe31df 100644
--- a/src/TaskMachine/Deadline.hs
+++ b/src/TaskMachine/Deadline.hs
@@ -33,7 +33,7 @@ data Deadline
   | DExpression TM.BoolExpr Duration
 
 -- | Find the next date of the 'Deadline' that's important for a certain day.
--- This returns a 'Just' when the day lies within the duration specified.
+-- This returns a @Just@ when the day lies within the duration specified.
 --
 -- If no duration is specified in a 'DFixed' deadline, all days before the deadline,
 -- including the deadline itself, are important (i. e. the duration is infinite).