Simone Linz, Katherine St. John, Charles Semple. Counting Trees in a Phylogenetic Network Is \#P-Complete. SIAM Journal on Computing, 42(4):1768-1776, 2013. [doi]
@article{LinzJS13,
title = {Counting Trees in a Phylogenetic Network Is \#P-Complete},
author = {Simone Linz and Katherine St. John and Charles Semple},
year = {2013},
doi = {10.1137/12089394X},
url = {http://dx.doi.org/10.1137/12089394X},
researchr = {https://researchr.org/publication/LinzJS13},
cites = {0},
citedby = {0},
journal = {SIAM Journal on Computing},
volume = {42},
number = {4},
pages = {1768-1776},
}