@ApiMethod(
      summary = APIDoc.SUM_RESURCES_KNOWLEDGE,
      responsestatuscode = APIDoc.STATUS_LIST_KNOWLEDGE_RESOURCE)
  @RequestMapping(value = "/knowledge/resources", method = RequestMethod.GET)
  public HttpEntity getKnowledgesAndAreas() {
    ResourcesKnowledge resource = new ResourcesKnowledge();
    resource.areas = service.listAreas();
    resource.subjects = service.listSubjects();

    return new ResponseEntity(resource, HttpStatus.OK);
  }
 @ApiMethod(summary = APIDoc.SUM_LIST_SUBJECTS)
 @RequestMapping(value = "/subjects", produces = "application/json")
 public HttpEntity getSubjects() {
   return new ResponseEntity(service.listSubjects(), HttpStatus.OK);
 }