Dennis E. Davenport, Louis W. Shapiro, Lara K. Pudwell, Leon C. Woodson. The Boundary of Ordered Trees. J. Integer Seq., 18(5), 2015. [doi]
@article{DavenportSPW15,
title = {The Boundary of Ordered Trees},
author = {Dennis E. Davenport and Louis W. Shapiro and Lara K. Pudwell and Leon C. Woodson},
year = {2015},
url = {https://cs.uwaterloo.ca/journals/JIS/VOL18/Davenport/dav3.html},
researchr = {https://researchr.org/publication/DavenportSPW15},
cites = {0},
citedby = {0},
journal = {J. Integer Seq.},
volume = {18},
number = {5},
}