diff --git a/index.Rmd b/index.Rmd
index f82c648..3ccc054 100644
--- a/index.Rmd
+++ b/index.Rmd
@@ -20,10 +20,10 @@ Find the current course details (dates and deadlines) at [uibk.ac.at](https://lf
 ## Slides
 
 - Day 1 - [Introduction](https://tklammsteiner.github.io/waste-management-course/docs/day_1/biogas_ue_day_1.html)
-- Day 4 - 
-- Day 6 - 
-- Day 8 -
-- Day 10 -
+- Day 4 - [[Pathogen test & isolation]](https://tklammsteiner.github.io/waste-management-course/docs/day_1/biogas_ue_day_4.html)
+- Day 6 - [[Colony PCR]](https://tklammsteiner.github.io/waste-management-course/docs/day_1/biogas_ue_day_6.html)
+- Day 8 - [[Biomolecular characterization 1]](https://tklammsteiner.github.io/waste-management-course/docs/day_1/biogas_ue_day_8.html)
+- Day 10 - [[Biomolecular characterization 1]](https://tklammsteiner.github.io/waste-management-course/docs/day_1/biogas_ue_day_10.html)
 
 ## Abstract template
 
@@ -31,6 +31,10 @@ Find the current course details (dates and deadlines) at [uibk.ac.at](https://lf
 
 **Instructions:** Stick to the provided format and don't change any site or font settings. Before submitting the final version of your abstract, please rename the document with "abstract_\<yourlastname>.docx". Please do not convert the document to .pdf.
 
+Tipps + writing help:
+- Grech, V., 2018. WASP (Write a Scientific Paper): Preparing an abstract. Early Hum Dev 125, 51–52. https://doi.org/10.1016/j.earlhumdev.2018.06.005
+
+
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 ## Poster guidelines