Merge pull request #159 from m2lines/fix/paper-doi

add paper dois to paper.bib

Author: dhruvbalwada

paper.bib

@@ -9,12 +9,14 @@ @article{Lorenz1995
   organization = {ECMWF},
   address = {Shinfield Park, Reading},
   url = {https://www.ecmwf.int/node/10829},
-  author = {Lorenz, E.N.}
+  author = {Lorenz, E.N.},
+  doi = {10.1017/cbo9780511617652.004}
 }
 
 @article{christensen2022parametrization,
   title={Parametrization in weather and climate models},
   author={Christensen, Hannah and Zanna, Laure},
   year={2022},
-  publisher={Oxford University Press}
+  publisher={Oxford University Press},
+  doi = {10.1093/acrefore/9780190228620.013.826}
 }