added "ands" between authors

paper/paper.bib

@@ -6,7 +6,7 @@
 }
 @article{Jacobs:2016,
   title="{Refining the Use of Linkage Disequilibrium as a Robust Signature of Selective Sweeps}",
-  author={{Jacobs}, G.S., {Sluckin}, T.J. and {Kivisild}, T.},
+  author={{Jacobs}, G.S., and {Sluckin}, T.J. and {Kivisild}, T.},
   journal={Genetics},
   volume={203},
   number={4},
@@ -16,7 +16,7 @@
 }
 @article{Jeffreys:2001,
   title="{Intensely punctate meiotic recombination in the class II region of the major histocompatibility complex}",
-  author={{Jeffreys}, A.J., {Kauppi}, L. and {Neumann}, R.},
+  author={{Jeffreys}, A.J., and {Kauppi}, L. and {Neumann}, R.},
   journal={Nature Genetics},
   volume={29},
   pages={217},
@@ -43,7 +43,7 @@
   year={1974},
 }
 @incollection{Vitti:2013,
-  author       = {{Vitti}, J.J., {Grossman}, S.R. and {Sabeti}, P.C.},
+  author       = {{Vitti}, J.J., and {Grossman}, S.R. and {Sabeti}, P.C.},
   title        = {Detecting Natural Selection in Genomic Data},
   booktitle    = {Annual Review of Genetics},
   publisher    = {Annual Reviews},