diff --git a/DESCRIPTION b/DESCRIPTION
index 99b6601..34a485e 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -10,12 +10,12 @@ Description: Computation of the International Roughness Index (IRI) given a
   longitudinal road profile. The IRI can be calculated for a single road segment
   or for a sequence of segments with a fixed length (e. g. 100m).
   For the latter, an overlap of the segments can be selected.
-  The IRI and likewise the algorithms for its determination are defined in:
+  The IRI and likewise the algorithms for its determination are defined in
   Sayers, Michael W; Gillespie, Thomas D; Queiroz, Cesar A.V. 1986.
   The International Road Roughness Experiment (IRRE) : establishing correlation
   and a calibration standard for measurements. World Bank technical paper;
-  no. WTP 45. Washington, DC : The World Bank. (ISBN 0-8213-0589-1).
-  <http://documents.worldbank.org/curated/en/326081468740204115>
+  no. WTP 45. Washington, DC : The World Bank. (ISBN 0-8213-0589-1) available
+  from <http://documents.worldbank.org/curated/en/326081468740204115>.
 License: MIT + file LICENSE
 URL: http://github.com/vsimko/rroad
 BugReports: http://github.com/vsimko/rroad/issues