Bart M. P. Jansen, Liana Khazaliya, Philipp Kindermann, Giuseppe Liotta, Fabrizio Montecchiani, Kirill Simonov. Upward and Rectilinear Planarity are W[1]-Hard Parameterized by Treewidth. SIAM J. Discrete Math., 40(2):706-742, 2026. [doi]
Abstract is missing.