Michel Bousquet, Cédric Lamathe. Enumeration of solid 2-trees according to edge number and edge degree distribution. Discrete Mathematics, 298(1-3):115-141, 2005. [doi]
@article{BousquetL05,
title = {Enumeration of solid 2-trees according to edge number and edge degree distribution},
author = {Michel Bousquet and Cédric Lamathe},
year = {2005},
doi = {10.1016/j.disc.2004.11.015},
url = {http://dx.doi.org/10.1016/j.disc.2004.11.015},
researchr = {https://researchr.org/publication/BousquetL05},
cites = {0},
citedby = {0},
journal = {Discrete Mathematics},
volume = {298},
number = {1-3},
pages = {115-141},
}