@article{  
   author = {M. Aschbacher, P. Baldi, E. B. Baum, R.M. Wilson},
   title = {Embeddings of Ultrametric Spaces in Finite Dimensional Structures.},
   journal = {SIAM Journal of Algebraic and Discrete Methods},
   volume = {8},
   number = {4},
   pages = {564-577},
   note = {},
   abstract = {},
   keywords = {},
   year = {1987}
}