@inproceedings\{dgl-utbed-09
, author =	"Emilio {Di Giacomo} and Francesco Giordano and Giuseppe Liotta"
, title =	"Upward Topological Book Embeddings of DAGs"
, booktitle =	"Prooceedings of 7th Japan Conference on Computational Geometry and Graphs (JCCGG 2009)"
, pages =	"131-13"
, year =	2009
}