Update references.rst (#3132)
Update references.rst (#3132)

* Update references.rst

* Added another ref

* Added another ref, from Weber et al
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox