On planes trees with a prescribed number of valency set realizations
N. M. Adrianov

References
1.	Schneps L., “Dessins d'enfants on the Riemann sphere”, The Grothendieck Theory of Dessins d'Enfants, London Math. Soc. Lect. Note Ser., 200, ed. L. Schneps, Cambridge University Press, Cambridge, 1994, 47–78
2.	Shabat G., “On the classification of plane trees by their Galois orbit”, The Grothendieck Theory of Dessins d'Enfants, London Math. Soc. Lect. Note Ser., 200, ed. L. Schneps, Cambridge University Press, Cambridge, 1994, 169–177
3.	Tutte W. T., “Planted plane trees with a given partition”, Amer. Math. Monthly, 71:3 (1964), 272–277