1 files changed, 3 insertions, 5 deletions

diff --git a/README.md b/README.md
index 989229a..3539bdc 100644
--- a/README.md
+++ b/README.md
@@ -6,17 +6,15 @@ I am currently very interested in the solution of nonconservative hyperbolic
 systems, such as the acoustic equations derived in [1]. The main
 file here implements the primitive centered scheme (PRICE) from [2].
 
----
-t = 0.104 sec
+### t = 0.104 sec
 
 ![res104](https://github.com/zgxn/acoustic/blob/master/img/res104.png "image")
 
----
-t = 0.26 sec
+### t = 0.26 sec
 
 ![res26](https://github.com/zgxn/acoustic/blob/master/img/res26.png "image")
 
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+## references
 
 [1] LeVeque, R.J. Wave propagation algorithms for multidimensional hyperbolic
 systems, Journal of Computational Physics 131, 327-353, 1997.