tighten references

1 files changed, 28 insertions, 23 deletions

diff --git a/ref.bib b/ref.bib
index c71e44c..a4f5a4e 100644
--- a/ref.bib
+++ b/ref.bib
@@ -108,6 +108,13 @@
   crossref = {DiBona1999},
 }
 
+@InCollection{Ashford2018,
+  author   = {Elizabeth Ashford and Tim Mulgan},
+  title    = {Contractualism},
+  url      = {https://plato.stanford.edu/archives/sum2018/entries/contractualism/},
+  crossref = {Stanford2018},
+}
+
 @InBook{Dedeurwaerdere2006,
   author = {Tom Dedeurwaerdere},
   title  = {Databases, Biological Information and Collective Action},
@@ -805,20 +812,6 @@
   publisher    = {Springer Science and Business Media LLC},
 }
 
-@Book{Popper2013,
-  author    = {Popper, Karl R.},
-  date      = {2013},
-  title     = {The Open Society and Its Enemies},
-  edition   = {New One-Volume edition with a New introduction by Alan Ryan and an essay by E. H. Gombrich},
-  editor    = {E. Gombrich and Alan Ryan},
-  isbn      = {9781400846672},
-  location  = {Princeton, NJ},
-  pagetotal = {1},
-  publisher = {Princeton University Press},
-  subtitle  = {New One-Volume Edition},
-  ppn_GVK   = {1066745226},
-}
-
 @Book{Forst2012,
   author    = {Forst, Rainer},
   date      = {2012},
@@ -1148,15 +1141,27 @@
   publisher    = {Springer Science and Business Media LLC},
 }
 
-@InCollection{Ashford2018,
-	author       =	{Ashford, Elizabeth and Mulgan, Tim},
-	title        =	{{Contractualism}},
-	booktitle    =	{The {Stanford} Encyclopedia of Philosophy},
-	editor       =	{Edward N. Zalta},
-	howpublished =	{\url{https://plato.stanford.edu/archives/sum2018/entries/contractualism/}},
-	year         =	{2018},
-	edition      =	{{S}ummer 2018},
-	publisher    =	{Metaphysics Research Lab, Stanford University}
+@Book{Popper2013,
+  author    = {Popper, Karl R.},
+  date      = {2013},
+  title     = {The Open Society and Its Enemies},
+  edition   = {New One-Volume edition with a New introduction by Alan Ryan and an essay by E. H. Gombrich},
+  editor    = {E. Gombrich and Alan Ryan},
+  isbn      = {9781400846672},
+  location  = {Princeton, NJ},
+  pagetotal = {1},
+  publisher = {Princeton University Press},
+  subtitle  = {New One-Volume Edition},
+}
+
+@Collection{Stanford2018,
+  date      = {2018-04-20},
+  editor    = {Edward N. Zalta},
+  title     = {The {Stanford} Encyclopedia of Philosophy},
+  edition   = {Summer 2018},
+  publisher = {Metaphysics Research Lab, Stanford University},
+  booktitle = {The {Stanford} Encyclopedia of Philosophy},
+  origdate  = {2007-08-30},
 }
 
 @Comment{jabref-meta: databaseType:biblatex;}