@article{CSIS_2010_7_2_a7,
     author = {Tomas Flouri and Jan Janousek and Borivoj Melichar},
     title = {Subtree {Matching} by {Pushdown} {Automata}},
     journal = {Computer Science and Information Systems},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {2010},
     url = {http://geodesic.mathdoc.fr/item/CSIS_2010_7_2_a7/}
}