Hi,

I've been searching the forum, but could not find any solution for my problem. I'm working on a style (for The Plant Journal, not in the repository; and the available EndNote style is not working properly through Zotero) that needs separate formats for single and multiple citations. It should look like this:

Single citations:

Apse (1999)
Aluri and Büttner (2007)
An et al. (2007)

Multiple citations:

(Apse, 1999; Aluri and Büttner, 2007; An et al., 2007)

Is there a "if"-clause to differentiate between single and multiple citations? Or is there a way to set up a citation element to format it properly? I've tried around a bit, but can't get the parenthesis around the year handled properly, nor the parenthesis around the whole citation (for multiple citations).
I'd be grateful for any help!

What I use currently (works for single citations):
<citation>
<option name="collapse" value="year-suffix"/>
<option name="et-al-min" value="3"/>
<option name="et-al-use-first" value="1"/>
<option name="et-al-subsequent-min" value="3"/>
<option name="et-al-subsequent-use-first" value="1"/>
<option name="disambiguate-add-year-suffix" value="true"/>
<option name="disambiguate-add-names" value="true"/>
<option name="disambiguate-add-givenname" value="false"/>
<sort>
<key variable="issued"/>
<key variable="author"/>
</sort>
<layout prefix="" suffix="" delimiter="; ">
<group delimiter=" ">
<text macro="author-short"/>
<date variable="issued" >
<date-part prefix="(" suffix=")" name="year"/>
</date>
<group>
<label variable="locator" suffix="." form="short"/>
<text variable="locator" prefix=" "/>
</group>
</group>
</layout>
</citation>