Petr Savický, Alan R. Woods. The number of Boolean functions computed by formulas of a given size. Random Struct. Algorithms, 13(3-4):349-382, 1998.
@article{SavickyW98,
title = {The number of Boolean functions computed by formulas of a given size},
author = {Petr Savický and Alan R. Woods},
year = {1998},
researchr = {https://researchr.org/publication/SavickyW98},
cites = {0},
citedby = {0},
journal = {Random Struct. Algorithms},
volume = {13},
number = {3-4},
pages = {349-382},
}