Add Zotero hint to skeleton

Change-Id: I95768158acc623a77e07c757800e4564f9c08c14
diff --git a/inst/rmarkdown/templates/posterdown_ids/skeleton/skeleton.Rmd b/inst/rmarkdown/templates/posterdown_ids/skeleton/skeleton.Rmd
index 62ce713..29c02d6 100644
--- a/inst/rmarkdown/templates/posterdown_ids/skeleton/skeleton.Rmd
+++ b/inst/rmarkdown/templates/posterdown_ids/skeleton/skeleton.Rmd
@@ -48,6 +48,16 @@
 
 This package uses the same workflow approach as the R Markdown you know and love. Basically it goes from RMarkdown > Knitr > Markdown > Pandoc > HTML/CSS > PDF. You can even use the bibliography the same way [@R-posterdown].
 
+### Bibliography
+
+* for generating references and bibliography Zotero is used
+* in order to produce IDS citation standard comliant bibliographies, put this into your header:
+
+```yaml
+csl: "https://raw.githubusercontent.com/ICLC-10/Zotero/master/styles/ICLC-10.csl"
+```
+
+
 # Results
 
 Usually you want to have a nice table displaying some important results that you have calculated. In `posterdown` this is as easy as using the `kable` table formatting you are probably use to as per typical R Markdown formatting.