no. 2
A generating function for fatgraphs
Annales de l'I.H.P. Physique théorique, Tome 59 (1993) no. 2, pp. 117-139. 
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     author = {Di Francesco, P. and Itzykson, C.},
     title = {A generating function for fatgraphs},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {117--139},
     publisher = {Gauthier-Villars},
     volume = {59},
     number = {2},
     year = {1993},
     mrnumber = {1277215},
     zbl = {0796.05045},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1993__59_2_117_0/}
}
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Di Francesco, P.; Itzykson, C. A generating function for fatgraphs. Annales de l'I.H.P. Physique théorique, Tome 59 (1993) no. 2, pp. 117-139. http://www.numdam.org/item/AIHPA_1993__59_2_117_0/

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