@article{DBLP:journals/cuza/BruniGL10,
author = {Roberto Bruni and
Fabio Gadducci and
Alberto Lluch-Lafuente},
title = {An Algebra of Hierarchical Graphs and its Application to
Structural Encoding},
journal = {Sci. Ann. Comp. Sci.},
volume = {20},
year = {2010},
pages = {53-96},
ee = {http://www.infoiasi.ro/bin/Annals/Article?v=XX{\&}a=2},
bibsource = {DBLP, http://dblp.uni-trier.de}
}