Update on Overleaf.

ccs-sample.bib

@@ -44,7 +44,7 @@
   SHORTAUTHOR = {1111},
   URL = {https://hal.archives-ouvertes.fr/hal-01888265/document},
   BOOKTITLE = {{17th IEEE International Symposium on Network Computing and Applications}},
-  DATE = {2018},
+  YEAR = {2018},
   SERIES = {NCA},
   SORTYEAR = {2018},
   TITLE = {{Sycomore : a Permissionless Distributed Ledger that self-adapts to Transactions Demand}},
@@ -54,7 +54,7 @@
   AUTHOR = {Churyumov, A.},
   SHORTAUTHOR = {1111},
   URL = {https://byteball.org/Byteball.pdf},
-  DATE = {2017},
+  YEAR = {2017},
   SORTYEAR = {2017},
   TITLE = {{ByteBall : A Decentralized System for Storage and Transfer of Value}},
 }
@@ -63,7 +63,7 @@
   AUTHOR = {Popov, S.},
   SHORTAUTHOR = {1111},
   URL = {https://assets.ctfassets.net/r1dr6vzfxhev/2t4uxvsIqk0EUau6g2sw0g/45eae33637ca92f85dd9f4a3a218e1ec/iota1_4_3.pdf},
-  DATE = {2017},
+  YEAR = {2017},
   SORTYEAR = {2017},
   TITLE = {The tangle},
 }