diff --git a/patacrep/authors.py b/patacrep/authors.py
index 3bdb6b9a..b902bb02 100644
--- a/patacrep/authors.py
+++ b/patacrep/authors.py
@@ -164,17 +164,21 @@ def processauthors(authors_string, after=None, ignore=None, sep=None):
 
     For example, we are processing:
     # processauthors(
-    #   "Lyrics by William Blake (from Milton, 1808),
-                    music by Hubert Parry (1916),
-                    and sung by The Royal\ Choir~of~Nowhere
-                    (just here to show you how processing is done)",
+    #    [
+    #        "
+    #            Lyrics by William Blake (from Milton, 1808),
+    #            music by Hubert Parry (1916),
+    #            and sung by The Royal\ Choir~of~Nowhere
+    #            (just here to show you how processing is done)
+    #        ",
+    #    ],
     #   after = ["by"],
     #   ignore = ["anonymous"],
     #   sep = [re.compile('^(.*) and (.*)$')],
     #   )
 
 
-    The "authors_string" string is processed as:
+    The "authors_string" is processed as:
 
     1) First, parenthesis (and its content) are removed.
     # "Lyrics by William Blake, music by Hubert Parry,
@@ -220,3 +224,10 @@ def processauthors(authors_string, after=None, ignore=None, sep=None):
                     ignore)
                 )
             ]
+
+def process_listauthors(authors_list):
+    """Process a list of authors, and return the list of resulting authors."""
+    return sum([
+        processauthors(string)
+        for string in authors_list
+        ])
diff --git a/patacrep/index.py b/patacrep/index.py
index 6a4300a2..8540d433 100644
--- a/patacrep/index.py
+++ b/patacrep/index.py
@@ -19,7 +19,6 @@ EOL = "\n"
 KEYWORD_PATTERN = re.compile(r"^%(\w+)\s?(.*)$", re.LOCALE)
 FIRST_LETTER_PATTERN = re.compile(r"^(?:\{?\\\w+\}?)*[^\w]*(\w)", re.LOCALE)
 
-
 def process_sxd(filename):
     """Parse sxd file.
 
@@ -162,7 +161,11 @@ class Index(object):
 
     def entry_to_str(self, key, entry):
         """Return the LaTeX code corresponding to the entry."""
-        return (r'\idxentry{{{0}}}{{{1}}}' + EOL).format(
+        return r"""\idxentry{{
+                {0}
+            }}{{
+                {1}
+            }}""".format(
                 self.key_to_str(key),
                 r'\\'.join([self.ref_to_str(ref) for ref in entry]),
                 )
@@ -182,13 +185,13 @@ class Index(object):
                     ]
         string = r'\begin{idxblock}{' + letter + '}' + EOL
         for key in sorted(entries, key=sortkey):
-            string += self.entry_to_str(key, entries[key]['entries'])
-        string += r'\end{idxblock}' + EOL
+            string += "  " + self.entry_to_str(key, entries[key]['entries'])
+        string += EOL + r'\end{idxblock}'
         return string
 
     def entries_to_str(self):
         """Return the LaTeX code corresponding to the index."""
         string = ""
         for letter in sorted(self.data.keys()):
-            string += self.idxblock_to_str(letter, self.data[letter])
+            string += self.idxblock_to_str(letter, self.data[letter]) + EOL
         return string
diff --git a/patacrep/songs/latex/__init__.py b/patacrep/songs/latex/__init__.py
index 2de16338..93fbccc7 100644
--- a/patacrep/songs/latex/__init__.py
+++ b/patacrep/songs/latex/__init__.py
@@ -16,7 +16,14 @@ class LatexSong(Song):
 
     def parse(self, content):
         """Parse content, and return the dictinory of song data."""
-        return parse_song(content, self.fullpath)
+        with encoding.open_read(self.fullpath, encoding=self.encoding) as song:
+            self.data = parse_song(song.read(), self.fullpath)
+        self.titles = self.data['@titles']
+        del self.data['@titles']
+        self.languages = self.data['@languages']
+        del self.data['@languages']
+        self.authors = [self.data['by']]
+        del self.data['by']
 
     def tex(self, output):
         """Return the LaTeX code rendering the song."""