Using "list sub pages by document type" template

I have a small question.

When you set the documenttype 

<xsl:variable name="documentTypeAlias" select="string('weblogItem')"/>

What syntax do you use if i want a documenttype called "paragraphs".


This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/27830-using-list-sub-pages-by-document-type-template