diff --git a/30_Thesis/thesis.bib b/30_Thesis/thesis.bib
index 4999654..00b612f 100644
--- a/30_Thesis/thesis.bib
+++ b/30_Thesis/thesis.bib
@@ -736,12 +736,10 @@
   langid = {english}
 }
 
-@article{hahslerRecommenderlabFrameworkDeveloping2015,
+@report{hahslerRecommenderlabFrameworkDeveloping2015,
   title = {Recommenderlab: {{A Framework}} for {{Developing}} and {{Testing Recommendation Algorithms}}},
-  shorttitle = {Recommenderlab},
   author = {Hahsler, Michael},
   date = {2015},
-  journaltitle = {https://cran.r-project.org/web/packages/recommenderlab/vignettes/recommenderlab.pdf},
   url = {http://elib.ict.nsc.ru/jspui/handle/ICT/1861},
   urldate = {2020-02-19},
   abstract = {The problem of creating recommendations given a large data base from directly elicited 
@@ -753,8 +751,7 @@ provides the infrastructure to develop and test recommender algorithms for ratin
 and 0-1 data in a unified framework. The Package provides basic algorithms and allows the 
 user to develop and use his/her own algorithms in the framework via a simple registration 
 procedure.},
-  file = {C\:\\Users\\Hannes.Kuchelmeister\\Zotero\\storage\\5T2FEWC3\\Hahsler_2015_recommenderlab.pdf;C\:\\Users\\Hannes.Kuchelmeister\\Zotero\\storage\\NL8A54FQ\\Hahsler - recommenderlab A Framework for Developing and Tes.pdf;C\:\\Users\\Hannes.Kuchelmeister\\Zotero\\storage\\TAJZI98C\\1861.html},
-  langid = {english}
+  file = {C\:\\Users\\Hannes.Kuchelmeister\\Zotero\\storage\\5T2FEWC3\\Hahsler_2015_recommenderlab.pdf}
 }
 
 @article{hernandezdelolmoEvaluationRecommenderSystems2008,