diff --git a/MP-IO/Controllers/WebAPI/CacheFilter.cs b/MP-IO/Controllers/WebAPI/CacheFilter.cs
index d1176ce1..7abef2a6 100644
--- a/MP-IO/Controllers/WebAPI/CacheFilter.cs
+++ b/MP-IO/Controllers/WebAPI/CacheFilter.cs
@@ -7,6 +7,11 @@ using System.Web.Http.Filters;
 
 namespace MP_IO.Controllers.WebAPI
 {
+    /// <summary>
+    /// Gestione cache x chaimate WebAPI
+    /// 
+    /// rif: https://www.c-sharpcorner.com/article/implementing-caching-in-web-api/
+    /// </summary>
     public class CacheFilter : ActionFilterAttribute
     {
         public int TimeDuration { get; set; }