Attempt to add book authors

Author: massimolipari

_layouts/bib.liquid

@@ -151,7 +151,17 @@
     {% if entry.type == 'article' %}
       {% capture entrytype %}<em>{{ entry.journal }}</em>{% endcapture %}
     {% elsif proceedings contains entry.type %}
-      {% capture entrytype %}<em>In {{ entry.booktitle }}</em>{% endcapture %}
+      {% assign entrytype = 'In ' %}
+      {% if entry.bookauthor %}
+        {%- for author in entry.bookauthor_array -%}
+          {% capture entrytype %}{{ entrytype }}{{- author.first }}{{ " " }}{{ author.last -}}{% endcapture %}
+          {%- if forloop.length > 1 -%}
+            {% if forloop.first == false %}{% assign entrytype | append ",&nbsp;" %}{% endif %}
+            {%- if forloop.last %}{% assign entrytype | append "&&nbsp;" %}{% endif -%}
+          {% endif %}
+        {% endfor %}
+      {% endif %}
+      {% assign entrytype | append {{ entry.booktitle }} | append "</em>" %}
     {% elsif thesis contains entry.type %}
       {% capture entrytype %}<em>{{ entry.school }}</em>{% endcapture %}
     {% else %}