Renzo Sprugnoli. Counting Labels in Binary Trees. BIT, 30(1):62-69, 1990.
@article{Sprugnoli90,
title = {Counting Labels in Binary Trees},
author = {Renzo Sprugnoli},
year = {1990},
researchr = {https://researchr.org/publication/Sprugnoli90},
cites = {0},
citedby = {0},
journal = {BIT},
volume = {30},
number = {1},
pages = {62-69},
}