@article{JMLR:v21:18-156,
  author  = {José R. Berrendero and Beatriz Bueno-Larraz and Antonio Cuevas},
  title   = {On Mahalanobis Distance in Functional Settings},
  journal = {Journal of Machine Learning Research},
  year    = {2020},
  volume  = {21},
  number  = {9},
  pages   = {1--33},
  url     = {http://jmlr.org/papers/v21/18-156.html}
}