Frati, F.Fulek, R.Ruz-Vargas, A. J.2013-03-152013-03-152013-03-15201210.1007/978-3-642-25878-7https://infoscience.epfl.ch/handle/20.500.14299/90425In this paper we study the page number of upward planar directed acyclic graphs. We prove that the page number of any upward planar directed acyclic graph G is a function of the page number of a four-connected subgraph of G; further, we provide an upper bound on the page number of G if G has small diameter; finally, we show that every upward planar directed acyclic graph has small page number if and only if every upward planar directed acyclic graph with small degree does.graph drawingsbook embeddingspage numbertext::conference output::conference proceedings::conference paper