@book{Michaelis2013,
  address   = {Leipzig},
  author    = {Michaelis, Susanne Maria and Maurer, Philippe and Haspelmath, Martin and Huber, Magnus},
  publisher = {Max Planck Institute for Evolutionary Anthropology},
  title     = {The Atlas of Pidign and Creole language structures online},
  year      = {2013}
}