fix bib

Former-commit-id: 8b6877a

Author: scottgigante-immunai

main.bib

@@ -896,8 +896,8 @@ @inproceedings{venna2001neighborhood
   booktitle     = {Artificial Neural Networks {\textemdash} {ICANN} 2001},
   publisher     = {Springer Berlin Heidelberg},
   pages         = {485--491},
-  doi           = {10.1007/3-540-44668-0\_68},
-  url           = {https://doi.org/10.1007/3-540-44668-0\_68},
+  doi           = {{10.1007/3-540-44668-0\_68}},
+  url           = {{https://doi.org/10.1007/3-540-44668-0\_68}},
 }
 @article{venna2006local,
   title         = {Local multidimensional scaling},