add zhang supar paper

amu-literature.bib

@@ -925,6 +925,17 @@
   groups    = {Tokenization},
 }
 
+@InProceedings{zhang-etal-2020-efficient,
+  author    = {Zhang, Yu and Li, Zhenghua and Zhang Min},
+  booktitle = {Proceedings of ACL},
+  title     = {Efficient Second-Order {T}ree{CRF} for Neural Dependency Parsing},
+  year      = {2020},
+  pages     = {3295--3305},
+  file      = {:2005.00975v2.pdf:PDF},
+  groups    = {transition-based-parsing},
+  url       = {https://www.aclweb.org/anthology/2020.acl-main.302},
+}
+
 @Comment{jabref-meta: databaseType:bibtex;}
 
 @Comment{jabref-meta: grouping: