diff --git a/biblio-tools/examples.http b/biblio-tools/examples.http
index 98180f9..9891d17 100644
--- a/biblio-tools/examples.http
+++ b/biblio-tools/examples.http
@@ -27,7 +27,7 @@
 
 
 
-# crossref/pref
+# crossref/pref/1
 POST https://biblio-tools.services.inist.fr/v1/crossref/prefixes/expand?indent=true HTTP/1.1
 Content-Type: application/json
 
@@ -42,7 +42,7 @@
 
 
 
-# crossref/pref
+# crossref/pref/2
 POST https://biblio-tools.services.inist.fr/v1/crossref/prefixes/expand?indent=true HTTP/1.1
 Content-Type: application/json
 
@@ -54,4 +54,3 @@
   { "value": "10.1029/2018jd029272"}
 ]
 ###
-
diff --git a/biblio-tools/v1/crossref/prefixes/expand.ini b/biblio-tools/v1/crossref/prefixes/expand.ini
index f8de20e..278277b 100644
--- a/biblio-tools/v1/crossref/prefixes/expand.ini
+++ b/biblio-tools/v1/crossref/prefixes/expand.ini
@@ -27,7 +27,7 @@
 
 [expand/assign]
 path = value
-value = get('value).split('/').filter(i=>i.match(/^10./)).pop()
+value = get('value').split('/').filter(i => i.match(/^10./)).pop()
 
 [expand/assign]
 path = url