diff --git a/op_guide/stolon/manual_backup.md b/op_guide/stolon/manual_backup.md
index fa7e13f..654d789 100644
--- a/op_guide/stolon/manual_backup.md
+++ b/op_guide/stolon/manual_backup.md
@@ -297,9 +297,9 @@ rsync --progress -av /tmp/sql/{*.tar.gz,backup_manifest,dump-*} backup/target
 
 ## Ref
 
-https://philipmcclarence.com/backing-up-and-restoring-postgres-using-pg_basebackup/
-https://www.cybertec-postgresql.com/en/pg_basebackup-creating-self-sufficient-backups/
-https://www.postgresql.org/docs/14/continuous-archiving.html
-https://www.postgresql.org/docs/14/backup-dump.html#BACKUP-DUMP-RESTORE
-https://dba.stackexchange.com/questions/75033/how-to-restore-everything-including-postgres-role-from-pg-dumpall-backup
-https://blog.capdata.fr/index.php/postgresql-13-les-nouveautes-interessantes/
+ - https://philipmcclarence.com/backing-up-and-restoring-postgres-using-pg_basebackup/
+ - https://www.cybertec-postgresql.com/en/pg_basebackup-creating-self-sufficient-backups/
+ - https://www.postgresql.org/docs/14/continuous-archiving.html
+ - https://www.postgresql.org/docs/14/backup-dump.html#BACKUP-DUMP-RESTORE
+ - https://dba.stackexchange.com/questions/75033/how-to-restore-everything-including-postgres-role-from-pg-dumpall-backup
+ - https://blog.capdata.fr/index.php/postgresql-13-les-nouveautes-interessantes/