Alberto Policriti, Alexandru I. Tomescu. Counting extensional acyclic digraphs. Inf. Process. Lett., 111(16):787-791, 2011. [doi]
@article{PolicritiT11,
title = {Counting extensional acyclic digraphs},
author = {Alberto Policriti and Alexandru I. Tomescu},
year = {2011},
doi = {10.1016/j.ipl.2011.05.014},
url = {http://dx.doi.org/10.1016/j.ipl.2011.05.014},
researchr = {https://researchr.org/publication/PolicritiT11},
cites = {0},
citedby = {0},
journal = {Inf. Process. Lett.},
volume = {111},
number = {16},
pages = {787-791},
}