update refs style

docs/src/references.bib

@@ -56,25 +56,22 @@ @techreport{Carpenter-Kennedy-1994
   url = {https://ntrs.nasa.gov/api/citations/19940028444/downloads/19940028444.pdf}
 }
 
-@article{Toner-Tu,
-  title = {Long-Range Order in a Two-Dimensional Dynamical $\mathrm{XY}$ Model: How Birds Fly Together},
-  author = {Toner, John and Tu, Yuhai},
-  journal = {Phys. Rev. Lett.},
+@article{Toner-Tu-1995,
+  title = {Long-Range order in a two-dimensional dynamical $\mathrm{XY}$ model: How birds fly together},
+  author = {Toner, J. and Tu, Y.},
+  journal = {Physical Review Letters},
   volume = {75},
   issue = {23},
-  pages = {4326--4329},
-  numpages = {0},
+  pages = {4326-4329},
   year = {1995},
-  month = {Dec},
-  publisher = {American Physical Society},
   doi = {10.1103/PhysRevLett.75.4326},
-  url = {https://link.aps.org/doi/10.1103/PhysRevLett.75.4326}
 }
 
-@book{chaikin-Lubensky, 
-    place={Cambridge}, 
-    title={Principles of Condensed Matter Physics}, 
-    DOI={10.1017/CBO9780511813467}, 
-    publisher={Cambridge University Press}, 
-    author={Chaikin, P. M. and Lubensky, T. C.}, year={1995}
+@book{Chaikin-Lubensky-1995,
+  title = {Principles of condensed matter physics},
+  author = {Chaikin, P. M. and Lubensky, T. C.},
+  publisher = {Cambridge University Press},
+  place = {Cambridge},
+  doi = {10.1017/CBO9780511813467},
+  year = {1995}
 }