DOC: fix bibliography location, authors, and duplicate DOI

Author: Dpereaptkhamur-13

doc/references.bib

@@ -4,16 +4,6 @@
 # not both, as the DOI turns into a link which is redundant with the URL.
 
 % MNE-C reference
-@article{AppelhoffSanderson2023,
-  author = {Appelhoff, Stefan and Sanderson, Nathan J.},
-  title = {The importance of adding a zero-filled channel for the reference electrode when re-referencing {EEG} data},
-  journal = {Frontiers in Signal Processing},
-  year = {2023},
-  doi = {10.3389/frsip.2023.1064138},
-  volume = {3},
-  pages = {1064138}
-  doi = {10.3389/frsip.2023.1064138},
-}
 @article{GramfortEtAl2014,
   title = {{{MNE}} Software for Processing {{MEG}} and {{EEG}} Data},
   author = {Gramfort, Alexandre and Luessi, Martin and Larson, Eric and Engemann, Denis A. and Strohmeier, Daniel and Brodbeck, Christian and Parkkonen, Lauri and H{\"a}m{\"a}l{\"a}inen, Matti S.},
@@ -35,6 +25,15 @@ @article{GramfortEtAl2013a
   number = {267}
 }
 % everything else
+@article{AppelhoffSanderson2023,
+  author  = {Appelhoff, Stefan and Sanderson, Nathan J.},
+  title   = {The importance of adding a zero-filled channel for the reference electrode when re-referencing {EEG} data},
+  journal = {Frontiers in Signal Processing},
+  year    = {2023},
+  volume  = {3},
+  pages   = {1064138},
+  doi     = {10.3389/frsip.2023.1064138},
+}
 @article{NolanEtAl2010,
   author  = {Nolan, H. and Whelan, R. and Reilly, R. B.},
   title   = {{FASTER}: Fully Automated Statistical Thresholding for {EEG} artifact Rejection},