diff --git a/how_to b/how_to
index f4b8ab5..a545947 100644
--- a/how_to
+++ b/how_to
@@ -207,6 +207,7 @@ MAC spoofing:
     sudo ip link set dev <IF> up
 
 Mount as user:
+    /!\ on filesystems with permissions, it is permanent
     sudo mount /dev/sd[a-z][0-9] /mnt
     sudo chown <user> /mnt
 
@@ -456,3 +457,17 @@ Echo to stderr
 Reset gpg-agent passphrase cache
     Useful mainly for testing purposes
     echo RELOADAGENT | gpg-connect-agent
+
+Better Bibtex, Zotero:
+    Add URL to webpages
+        https://retorque.re/zotero-better-bibtex/scripting/
+        if (Translator.BetterBibTeX && item.itemType === 'webpage') {
+            if (item.accessDate) {
+                this.add({ name: 'note', value: "(accessed " + item.accessDate + ")" });
+            }
+            if (item.url) {
+                this.add({ name: 'howpublished', bibtex: "{\\url{" + this.enc_verbatim({value: item.url}) + "}}" });
+            }
+        }
+
+