diff --git a/src/main/java/fr/abes/sudoc/component/BaseXmlFunctionsCaller.java b/src/main/java/fr/abes/sudoc/component/BaseXmlFunctionsCaller.java
index a3dca1b..2153532 100644
--- a/src/main/java/fr/abes/sudoc/component/BaseXmlFunctionsCaller.java
+++ b/src/main/java/fr/abes/sudoc/component/BaseXmlFunctionsCaller.java
@@ -1,9 +1,6 @@
 package fr.abes.sudoc.component;
 
-import fr.abes.sudoc.utils.ExecutionTime;
 import lombok.extern.slf4j.Slf4j;
-import org.hibernate.annotations.ColumnTransformer;
-import org.springframework.dao.EmptyResultDataAccessException;
 import org.springframework.jdbc.UncategorizedSQLException;
 import org.springframework.jdbc.core.JdbcTemplate;
 import org.springframework.stereotype.Component;
diff --git a/src/main/java/fr/abes/sudoc/controller/SudocController.java b/src/main/java/fr/abes/sudoc/controller/SudocController.java
index f56570d..029f3c1 100644
--- a/src/main/java/fr/abes/sudoc/controller/SudocController.java
+++ b/src/main/java/fr/abes/sudoc/controller/SudocController.java
@@ -29,14 +29,21 @@
 @RequestMapping("/api/v1")
 public class SudocController {
 
-    @Autowired
-    private IdentifiantFactory factory;
-    @Autowired
-    private SudocService service;
-    @Autowired
-    private NoticeService noticeService;
-    @Autowired
-    private ProviderService providerService;
+
+    private final IdentifiantFactory factory;
+
+    private final SudocService service;
+
+    private final NoticeService noticeService;
+
+    private  final ProviderService providerService;
+
+    public SudocController(IdentifiantFactory factory, SudocService service, NoticeService noticeService, ProviderService providerService) {
+        this.factory = factory;
+        this.service = service;
+        this.noticeService = noticeService;
+        this.providerService = providerService;
+    }
 
 
     @GetMapping(value = {"/online_identifier_2_ppn/{type}/{onlineIdentifier}", "/online_identifier_2_ppn/{type}/{onlineIdentifier}/{provider}"}, produces = MediaType.APPLICATION_JSON_VALUE)
diff --git a/src/main/java/fr/abes/sudoc/service/IsbnService.java b/src/main/java/fr/abes/sudoc/service/IsbnService.java
index 2a896b9..e6fdba2 100644
--- a/src/main/java/fr/abes/sudoc/service/IsbnService.java
+++ b/src/main/java/fr/abes/sudoc/service/IsbnService.java
@@ -1,14 +1,10 @@
 package fr.abes.sudoc.service;
 
-import com.fasterxml.jackson.core.JsonProcessingException;
 import fr.abes.sudoc.component.BaseXmlFunctionsCaller;
-import fr.abes.sudoc.exception.IllegalPpnException;
-import fr.abes.sudoc.utils.Utilitaire;
 import org.springframework.jdbc.UncategorizedSQLException;
 import org.springframework.stereotype.Service;
 
 import java.io.IOException;
-import java.sql.SQLRecoverableException;
 import java.util.List;
 
 @Service
diff --git a/src/main/java/fr/abes/sudoc/service/ProviderService.java b/src/main/java/fr/abes/sudoc/service/ProviderService.java
index 1bd27fa..a555867 100644
--- a/src/main/java/fr/abes/sudoc/service/ProviderService.java
+++ b/src/main/java/fr/abes/sudoc/service/ProviderService.java
@@ -37,13 +37,14 @@ public Optional<ElementDto> getProviderDisplayName(Optional<String> shortname) {
         Optional<ElementDto> providerDisplayName = Optional.empty();
         if (shortname.isPresent()) {
             Optional<Provider> provider = this.providerRepository.findByProvider(shortname.get());
-            Optional<ElementDto> elementDto = Optional.of(new ElementDto());
             if (provider.isPresent()) {
-                elementDto.get().setProvider(provider.get().getProvider());
-                elementDto.get().setDisplayName(provider.get().getDisplayName());
-                elementDto.get().setIdProvider(provider.get().getIdtProvider());
+                ElementDto elementDto = new ElementDto();
+                elementDto.setProvider(provider.get().getProvider());
+                elementDto.setDisplayName(provider.get().getDisplayName());
+                elementDto.setIdProvider(provider.get().getIdtProvider());
+                providerDisplayName = Optional.of(elementDto);
             }
-            providerDisplayName = elementDto;
+
         }
         return providerDisplayName;
     }
@@ -73,7 +74,7 @@ public boolean checkProviderDansNoticeGeneral(Optional<ElementDto> providerDispl
                     || this.checkProviderDansNotice(providerDisplayName.get().getProvider(), notice)
                     || this.checkProviderIn035(providerDisplayName.get().getIdProvider(), notice);
         }
-        return false;
+        return true;
     }
 
     private boolean checkProviderDansNotice(String provider, NoticeXml notice) {