Valery A. Liskovets, Timothy R. S. Walsh. Enumeration of eulerian and unicursal planar maps. Discrete Mathematics, 282(1-3):209-221, 2004. [doi]
@article{LiskovetsW04,
title = {Enumeration of eulerian and unicursal planar maps},
author = {Valery A. Liskovets and Timothy R. S. Walsh},
year = {2004},
doi = {10.1016/j.disc.2003.09.015},
url = {http://dx.doi.org/10.1016/j.disc.2003.09.015},
researchr = {https://researchr.org/publication/LiskovetsW04},
cites = {0},
citedby = {0},
journal = {Discrete Mathematics},
volume = {282},
number = {1-3},
pages = {209-221},
}