@Misc{ 
  AloDiF16a,
  author = { Alouges, François and Di Fratta, Giovanni },
  title = { Parking 3-sphere swimmer. I. Energy minimizing strokes },
  journal = {  },
  year = { 2016 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5119/ },
  note = { cvgmt preprint}
}