A
[AN80] André Arnold et Maurice Nivat. The metric space of infinite trees. Algebraic and topological properties. Fundamenta Informaticae 3(4):445-476. IOS Press, 1980. 
@article{fundi3(4)-AN,
  author =              {Arnold, Andr{\'e} and Nivat, Maurice},
  title =               {The metric space of infinite trees. Algebraic and
                         topological properties},
  publisher =           {IOS Press},
  journal =             {Fundamenta Informaticae},
  volume =              {3},
  number =              {4},
  pages =               {445-476},
  year =                {1980},
}
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