DOC: Add MSM reference

Author: mgxd

smriprep/data/boilerplate.bib

@@ -322,3 +322,15 @@ @article{posse_t2s
     volume = 42,
     year = 1999
 }
+
+@article{msm,
+    author = {Emma C. Robinson and Saad Jbabdi and Matthew F. Glasser and Jesper Andersson and Gregory C. Burgess and Michael P. Harms and Stephen M. Smith and David C. Van Essen and Mark Jenkinson},
+	doi = {10.1016/j.neuroimage.2014.05.069},
+	year = 2014,
+	month = {oct},
+	volume = {100},
+	pages = {414-426},
+	title = {{MSM}: A new flexible framework for Multimodal Surface Matching},
+    url = {https://doi.org/10.1016/j.neuroimage.2014.05.069},
+	journal = {NeuroImage}
+}