Index: doc/groups.dox
===================================================================
--- doc/groups.dox	(revision 640)
+++ doc/groups.dox	(revision 651)
@@ -336,6 +336,11 @@
 In most cases the \ref Preflow "Preflow" algorithm provides the
 fastest method for computing a maximum flow. All implementations
-provides functions to also query the minimum cut, which is the dual
-problem of the maximum flow.
+also provide functions to query the minimum cut, which is the dual
+problem of maximum flow.
+
+\ref Circulation is a preflow push-relabel algorithm implemented directly 
+for finding feasible circulations, which is a somewhat different problem,
+but it is strongly related to maximum flow.
+For more information, see \ref Circulation.
 */
 
@@ -542,8 +547,8 @@
 @defgroup spantree Minimum Spanning Tree Algorithms
 @ingroup algs
-\brief Algorithms for finding a minimum cost spanning tree in a graph.
-
-This group contains the algorithms for finding a minimum cost spanning
-tree in a graph.
+\brief Algorithms for finding minimum cost spanning trees and arborescences.
+
+This group contains the algorithms for finding minimum cost spanning
+trees and arborescences.
 */
 
Index: doc/mainpage.dox
===================================================================
--- doc/mainpage.dox	(revision 559)
+++ doc/mainpage.dox	(revision 651)
@@ -42,12 +42,8 @@
 \subsection howtoread How to read the documentation
 
-If you want to get a quick start and see the most important features then
-take a look at our \ref quicktour
-"Quick Tour to LEMON" which will guide you along.
-
-If you already feel like using our library, see the
+If you would like to get to know the library, see
 <a class="el" href="http://lemon.cs.elte.hu/pub/tutorial/">LEMON Tutorial</a>.
 
-If you know what you are looking for then try to find it under the
+If you know what you are looking for, then try to find it under the
 <a class="el" href="modules.html">Modules</a> section.