@article{MSH_1992__117__61_0,
     author = {Panayotopoulos, A. and Sapounakis, A.},
     title = {On binary trees and permutations},
     journal = {Math\'ematiques informatique et sciences humaines},
     pages = {61--70},
     publisher = {Ecole des hautes-\'etudes en sciences sociales},
     volume = {117},
     year = {1992},
     mrnumber = {1164609},
     zbl = {0846.05021},
     language = {en},
     url = {http://www.numdam.org/item/MSH_1992__117__61_0/}
}