diff --git a/biblio-tools/v1/crossref/works/expand.ini b/biblio-tools/v1/crossref/works/expand.ini
index 45fb5c9..ddccc40 100644
--- a/biblio-tools/v1/crossref/works/expand.ini
+++ b/biblio-tools/v1/crossref/works/expand.ini
@@ -49,7 +49,7 @@
 path = rows
 value = fix(self.length)
 path = filter
-value = self().map(x => 'doi:'.concat(x)).join(',')
+value = self().filter(x => x.match(/^10.\d{4,9}\/[^\s]+$/i)).map(x => 'doi:'.concat(x)).join(',')
 
 # see https://github.com/CrossRef/rest-api-doc#api-overview
 [combine/URLStream]
@@ -57,11 +57,37 @@
 path = .items.*
 timeout = 30000
 
+; Simplification de la structure à postriori (le faire à priori était également possible)
+[combine/exchange]
+value = self().omit(['indexed', 'reference'])
+
+
+[combine/OBJFlatten]
+
+
 [combine/replace]
 path = id
 value = get('DOI')
 path = value
 value = self()
 
+# On nettoie l'objet en supprimant les champs temporaires
+[exchange]
+value = self().omit('bufferID')
+
+[assign]
+path = value
+value = get('value.value', 'n/a')
+
+# On marque les réponses qui n'ont pas abouties
+[swing]
+test = has('value.DOI')
+reverse = true
+
+[swing/assign]
+path = value
+value = fix('n/a')
+
+
 [dump]
 indent = env('indent', false)