diff --git a/article/paper.bib b/article/paper.bib
index 6ca7c73..c73beab 100644
--- a/article/paper.bib
+++ b/article/paper.bib
@@ -292,7 +292,6 @@ @article{Rashid2020
   month      = {01},
   articleno  = {178},
   numpages   = {51},
-  doi        = {10.5555/3455716.3455894},
   url        = {https://dl.acm.org/doi/abs/10.5555/3455716.3455894},
   keywords   = {multi-agent coordination, multi-agent learning, reinforcement learning}
 }
@@ -442,7 +441,6 @@ @incollection{PyTorch2019
   publisher = {Curran Associates, Inc.},
   title     = {{PyTorch: An Imperative Style, High-Performance Deep Learning Library}},
   url       = {https://dl.acm.org/doi/10.5555/3454287.3455008},
-  doi       = {10.5555/3454287.3455008},
   volume    = {32},
   year      = {2019}
 }