@article\{dgl-utbed-11
, author =	"Emilio {Di Giacomo} and Francesco Giordano and Giuseppe Liotta"
, title =	"Upward Topological Book Embeddings of DAGs"
, journal =	"SIAM Journal on Discrete Mathematics"
, volume =	25
, number =	"2"
, pages =	"479-489"
, year =	2011
}