diff --git a/MainWindow.xaml b/MainWindow.xaml
index c1905a3..ce677e2 100644
--- a/MainWindow.xaml
+++ b/MainWindow.xaml
@@ -21,7 +21,7 @@
             </Button.RenderTransform>
         </Button>
         <Label Content="Debug" HorizontalAlignment="Left" Margin="44,544,0,0" VerticalAlignment="Top" Foreground="White"/>
-        <Button x:Name="CopyDebug" Content="Button" HorizontalAlignment="Left" Margin="111,547,0,0" VerticalAlignment="Top" Foreground="{x:Null}" BorderBrush="{x:Null}" Width="23" Background="White" Click="CopyDebug_Click">
+        <Button x:Name="CopyDebug" ToolTip="Copia contenuto debug negli appunti" Cursor="Hand" Content="Button" HorizontalAlignment="Left" Margin="111,547,0,0" VerticalAlignment="Top" Foreground="{x:Null}" BorderBrush="{x:Null}" Width="23" Background="White" Click="CopyDebug_Click">
             <Button.OpacityMask>
                 <ImageBrush ImageSource="/copy-icon.png"/>
             </Button.OpacityMask>
diff --git a/MainWindow.xaml.cs b/MainWindow.xaml.cs
index 44139ff..e15b278 100644
--- a/MainWindow.xaml.cs
+++ b/MainWindow.xaml.cs
@@ -16,9 +16,13 @@ namespace Txt2Bib
         public MainWindow()
         {
             InitializeComponent();
+            OutputDir = $@"{Directory.GetCurrentDirectory()}\bibtex";
+            Directory.CreateDirectory(OutputDir);
             DropArea.AllowDrop = true;
         }
 
+        private string OutputDir { get; }
+
         private void DropArea_Drop(object sender, DragEventArgs e)
         {
             // Get data object
@@ -38,7 +42,7 @@ namespace Txt2Bib
 
                 // Process file names
                 var fileNames = dataObject.GetFileDropList();
-                StringBuilder bd = new StringBuilder();
+                var bd = new StringBuilder();
                 foreach (var fileName in fileNames)
                 {
                     bd.Append(fileName + "\n");
@@ -70,7 +74,7 @@ namespace Txt2Bib
             var txt2bib = new Text2Bib();
             var result = txt2bib.Generate(DropArea.Text);
             Debug.Text = result;
-            using var outputFile = new StreamWriter("output_bibtex.bib");
+            using var outputFile = new StreamWriter($@"{OutputDir}\output_bibtex.bib");
             outputFile.Write(result);
         }
 
@@ -82,7 +86,7 @@ namespace Txt2Bib
 
         private void OpenDestFolderBtn_Click(object sender, RoutedEventArgs e)
         {
-            System.Diagnostics.Process.Start("explorer.exe", Directory.GetCurrentDirectory());
+            System.Diagnostics.Process.Start("explorer.exe", OutputDir);
         }
     }
 }
diff --git a/Records.cs b/Records.cs
index a036e40..72f3ffa 100644
--- a/Records.cs
+++ b/Records.cs
@@ -2,6 +2,7 @@
 using System.Configuration;
 using System.Linq;
 using System.Text.RegularExpressions;
+using System.Windows.Navigation;
 
 namespace Txt2Bib.Records
 {
@@ -29,14 +30,19 @@ namespace Txt2Bib.Records
                 a = a.Trim();
                 var s = a.Split(' ');
                 return $"{s[1]} {s[0]}";
-            }; 
+            };
+            var checkVol = (string v) =>
+            {
+                if (v.Length == 0) return byte.MinValue;
+                return v.Split(',').Length == 2 ?
+                    byte.Parse(v.Split(',')[0]) :
+                    byte.Parse(v);
+            };
             Author = temp.Select(a => rearrange(a)).ToArray();
             Year = ushort.Parse(entryLines[2]);
             Title = entryLines[3];
             Journal = entryLines[4];
-            Volume = entryLines[5].Split(',').Length == 2 ?
-               byte.Parse(entryLines[5].Split(',')[0]) :
-               byte.Parse(entryLines[5]);
+            Volume = checkVol(entryLines[5]);
             Issue = entryLines[5].Split(',').Length == 2 ?
                byte.Parse(entryLines[5].Split(',')[1]) : null;
             FirstPage = ushort.Parse(entryLines[6].Split('-')[0]);
@@ -48,12 +54,14 @@ namespace Txt2Bib.Records
 
         public override string ToString()
         {
-            return $"@{Type}" + "{" +$"{Author[0][..5]}_{Year},\n" +
+            var volNum = Volume.Equals(byte.MinValue) ? "" : $"\"{Volume}\"";
+
+            return $"@{Type}{{{Author[0][..5]}_{Year},\n" +
                 $"\tauthor = \"{string.Join(" and ", Author)}\",\n" +
                 $"\ttitle = {{{Title}}},\n" +
                 $"\tjournal = \"{Journal}\",\n" +
                 $"\tyear = \"{Year}\",\n" +
-                $"\tvolume = \"{Volume}\",\n" +
+                $"\tvolume = \"{volNum}\",\n" +
                 $"\tnumber = \"{Issue}\",\n" +
                 $"\tpages = \"{FirstPage}--{LastPage}\",\n" +
                 $"\tdoi = \"{Doi}\",\n" +