More documentation improvements

Change-Id: I34484d6df2e91eceb809aa97d189f8ea4918d8ea
diff --git a/man/RKorAPClient-package.Rd b/man/RKorAPClient-package.Rd
index a93a28f..e60c721 100644
--- a/man/RKorAPClient-package.Rd
+++ b/man/RKorAPClient-package.Rd
@@ -18,7 +18,15 @@
   You can learn more about 'KorAP' and use it directly on 'DeReKo' at <https://korap.ids-mannheim.de/>.
 }
 \references{
-Kupietz, Marc / Diewald, Nils / Margaretha, Eliza (2020): RKorAPClient: An R package for accessing the German Reference Corpus DeReKo via KorAP. In: Calzolari, Nicoletta, Frédéric Béchet, Philippe Blache, Khalid Choukri, Christopher Cieri,  Thierry Declerck, Sara Goggi, Hitoshi Isahara, Bente Maegaard, Joseph Mariani, Hélène Mazo, Asuncion Moreno, Jan Odijk, Stelios Piperidis (eds.): [Proceedings of The 12th Language Resources and Evaluation Conference (LREC 2020)](http://www.lrec-conf.org/proceedings/lrec2020/LREC-2020.pdf). Marseille: European Language Resources Association (ELRA), 7017-7023. <http://www.lrec-conf.org/proceedings/lrec2020/pdf/2020.lrec-1.867.pdf>
+Kupietz, Marc / Diewald, Nils / Margaretha, Eliza (2020):
+RKorAPClient: An R package for accessing the German Reference Corpus DeReKo
+via KorAP. In: Calzolari, Nicoletta, Frédéric Béchet, Philippe Blache,
+Khalid Choukri, Christopher Cieri,  Thierry Declerck, Sara Goggi,
+Hitoshi Isahara, Bente Maegaard, Joseph Mariani, Hélène Mazo,
+Asuncion Moreno, Jan Odijk, Stelios Piperidis (eds.):
+Proceedings of The 12th Language Resources and Evaluation Conference (LREC 2020)
+Marseille: European Language Resources Association (ELRA), 7017-7023.
+\url{http://www.lrec-conf.org/proceedings/lrec2020/pdf/2020.lrec-1.867.pdf}
 }
 \seealso{
 Useful links: