@unpublished{LouisRouquier2011,
  author  = {Pierre-Yves Louis and Jean-Baptiste Rouquier},
  title   = {Time-to-Coalescence for interacting particle systems : parallel versus sequential updating},
  institution = {Institut f{\"u}r Mathematik},
  series    = {Mathematische Statistik und Wahrscheinlichkeitstheorie : Preprint},
  number    = {2009, 03},
  year    = {2011},
}