{% if site.publication_category %}
{% for category in site.publication_category %}
{% assign title_shown = false %}
{% for post in site.publications reversed %}
{% if post.category != category[0] %}
{% continue %}
{% endif %}
{% unless title_shown %}
{{ category[1].title }}
{% assign title_shown = true %}
{% endunless %}
{% include archive-single.html %}
{% endfor %}
{% endfor %}
{% else %}
{% for post in site.publications reversed %}
{% include archive-single.html %}
{% endfor %}
{% endif %}
-->