diff --git a/application/default/controllers/ServiceController.php b/application/default/controllers/ServiceController.php
index a8301e89..1167a21d 100644
--- a/application/default/controllers/ServiceController.php
+++ b/application/default/controllers/ServiceController.php
@@ -314,11 +314,8 @@ class ServiceController extends Zend_Controller_Action
 				$citation=$row['mcitation'];
 			} else if ($row['citation'])
 			{
-				if (empty($row['datadoi']))
-				{
-					$citation=$row['citation'];
-				}
-				elseif (!strpos($row['citation'],$row['datadoi']))
+				$citation=$row['citation'];
+				if (!empty($row['datadoi']) && !strpos($row['citation'],$row['datadoi']))
 				{
 					$citation='<li>文章引用：'.$row['citation'].'</li>';
 					$citation.="<li>数据的引用：";
@@ -722,11 +719,8 @@ class ServiceController extends Zend_Controller_Action
 			$cit=$row['mcitation'];
 		} else if ($row['citation'])
 		{
-			if (empty($row['datadoi']))
-			{
-				$cit=$row['citation'];
-			}
-			elseif (!strpos($row['citation'],$row['datadoi']))
+			$cit=$row['citation'];
+			if (!empty($row['datadoi']) && !strpos($row['citation'],$row['datadoi']))
 			{
 				$cit='文章引用：'.$row['citation'];
 				$cit.="\r\n数据的引用：";