diff --git a/biblio-tools/v1/crossref/works/expand.ini b/biblio-tools/v1/crossref/works/expand.ini
index 8643800..6d873d9 100644
--- a/biblio-tools/v1/crossref/works/expand.ini
+++ b/biblio-tools/v1/crossref/works/expand.ini
@@ -27,52 +27,55 @@
 
 # Flow configuration
 [JSONParse]
-legacy = false
-separator = $
+separator = *
 
-[bufferize]
+[expand]
+path = value
+size = 10
+cacheName = post-v1-crossref-works-expand
 
-[combine]
+[expand/bufferize]
+
+[expand/combine]
 path = env('path', 'value')
 primer = get('bufferID')
 prepend = buffers
 append = transit
-cacheName = post-v1-crossref-works-expand
 
-[combine/exchange]
+[expand/combine/exchange]
 value = get('value')
 
-[combine/group]
+[expand/combine/group]
 size = 100
 
-[combine/replace]
+[expand/combine/replace]
 path = rows
 value = fix(self.length)
 path = filter
 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]
+[expand/combine/URLStream]
 url  = https://api.crossref.org/works
 path = .items.*
 timeout = 30000
 
 ; Simplification de la structure à postriori (le faire à priori était également possible)
-[combine/exchange]
+[expand/combine/exchange]
 value = self().omit(['indexed', 'reference'])
 
 
-[combine/OBJFlatten]
+[expand/combine/OBJFlatten]
 
 
-[combine/replace]
+[expand/combine/replace]
 path = id
 value = get('DOI')
 path = value
 value = self()
 
 # On nettoie l'objet en supprimant les champs temporaires
-[exchange]
+[expand/exchange]
 value = self().omit('bufferID')
 
 [assign]
diff --git a/biblio-tools/v1/inspirehep/works/expand.ini b/biblio-tools/v1/inspirehep/works/expand.ini
index 1603f88..8db514a 100644
--- a/biblio-tools/v1/inspirehep/works/expand.ini
+++ b/biblio-tools/v1/inspirehep/works/expand.ini
@@ -27,8 +27,7 @@
 
 # Flow configuration
 [JSONParse]
-legacy = false
-separator = $
+separator = *
 
 [expand]
 path = value
@@ -38,17 +37,16 @@
 url = get('value').prepend('https://inspirehep.net/api/doi/')
 json = true
 target = fix('value')
-timeout = 5000
+timeout = 3000
+retries = 2
 noerror = true
 
-; Suppression de certains champs
+; Simplification de la structure de la notice
 [expand/exchange]
 value = omit(['value.metadata.references'])
 
-; Simplification de la structure de la notice
 [expand/OBJFlatten]
 
-
 [expand/replace]
 path = id
 value = get('id')
@@ -71,11 +69,17 @@
 
 [expand/expand/aggregate]
 
-# On marque les réponses qui n'ont pas abouties
-[swing]
-test = has('value.id')
-reverse = true
+; On supprime uniqument le résulat des documents non trouvés pour
+; pour les conserver sans les mettre dans le cache
+[expand/swing]
+test = get('value.id').isEmpty()
+[expand/swing/exchange]
+value = self().omit('value')
 
+; Pour les documents sans résulat
+; On donne une valeur par défaut
+[swing]
+test = get('value.id').isEmpty()
 [swing/assign]
 path = value
 value = fix('n/a')
diff --git a/biblio-tools/v1/wos/works/expand.ini b/biblio-tools/v1/wos/works/expand.ini
index 82bbf02..62b3f74 100644
--- a/biblio-tools/v1/wos/works/expand.ini
+++ b/biblio-tools/v1/wos/works/expand.ini
@@ -42,32 +42,29 @@
 path = value
 value = get('value').toLower()
 
-# Pour traiter par lot on groupe puis on utilise spawn qui crée un buffer par lot
-[group]
+[expand]
+path = value
 size = env('size')
-
-[spawn]
-[spawn/ungroup]
-[spawn/bufferize]
+cacheName = post-v1-wos-expand
+[expand/bufferize]
 
 # On réalise un mapping dynamique sur le champ value (et on sauvegarde les correspondances trouvées)
-[spawn/combine]
+[expand/combine]
 path = value
 default = n/a
 primer = get('bufferID')
 prepend = buffers
 append = transit
-cacheName = post-v1-wos-expand
 
-[spawn/combine/group]
+[expand/combine/group]
 size = env('size')
 
-[spawn/combine/replace]
+[expand/combine/replace]
 path = dois
 value = self().map('value').filter(Boolean).map(x => JSON.stringify(x)).join(' OR ')
 
 # On crée un objet contenant tous les valeurs nécessaire pour créer une requete
-[spawn/combine/replace]
+[expand/combine/replace]
 path = usrQuery
 value = fix('DO=(', self.dois ,')').join('')
 path = databaseId
@@ -77,33 +74,50 @@
 path = firstRecord
 value = 1
 
-[spawn/combine/URLStream]
+[expand/combine/URLStream]
 url = https://wos-api.clarivate.com/api/wos/
 header = env('token').prepend('X-ApiKey:')
 path = Data.Records.records.REC.*
 timeout = 5000
 noerror = true
 
-[spawn/combine/OBJFlatten]
+[expand/combine/OBJFlatten]
 
-[spawn/combine/replace]
+[expand/combine/replace]
 path = id
 value = get('dynamic_data/cluster_related/identifiers/identifier').find({ type: 'xref_doi'}).get('value').toLower()
 
 path = value
 value = self()
 
-# On supprime les réponses qui n'ont pas abouties (
-[spawn/combine/drop]
-path = id
+# On supprime de la table de mapping, les réponses qui n'ont pas abouties
+[expand/combine/remove]
+test = get('id').isEmpty()
 
 # On nettoie l'objet en supprimant les champs temporaires
-[spawn/exchange]
+[expand/exchange]
 value = self().omit('bufferID')
 
-[assign]
+[expand/assign]
 path = value
-value = get('value.value', 'n/a')
+value = get('value.value')
+
+; On supprime uniqument le résulat des documents non trouvés pour
+; pour les conserver sans les mettre dans le cache
+[expand/swing]
+test = get('value.UID').isEmpty()
+[expand/swing/exchange]
+value = self().omit('value')
+
+
+; Pour les documents sans résulat
+; On donne une valeur par défaut
+[swing]
+test = get('value.UID').isEmpty()
+[swing/assign]
+path = value
+value = fix('n/a')
+
 
 [dump]
 indent = env('indent')