@article{Guerrero15,
	author = {Guerrero, R. and Ledig, C. and Schmidt-Richberg, A. and Rueckert, D.},
	title = {{Group-Constrained Laplacian Eigenmaps: Longitudinal AD Biomarker Learning}},
  pages="178--185",
  volume="9352",
  journal = "Machine Learning in Medical Imaging",
  year="2015"
}