by Tomas Flouri, Costas S. Iliopoulos, Jan Janousek, Borivoj Melichar and Solon P. Pissis
Reference:
T. Flouri, C. S. Iliopoulos, J. Janousek, B. Melichar, S. P. Pissis, "Tree template matching in ranked ordered trees by pushdown automata", Journal of Discrete Algorithms, vol. 17, 2012, pp. 15 - 23.
Bibtex Entry:
@article{Flouri201215,
title = "Tree template matching in ranked ordered trees by pushdown automata ",
journal = "Journal of Discrete Algorithms ",
volume = "17",
number = "0",
pages = "15 - 23",
year = "2012",
author = "Tomas Flouri and Costas S. Iliopoulos and Jan Janousek and Borivoj Melichar and Solon P. Pissis",
doi = "10.1016/j.jda.2012.10.003"
}