Bastert, Oliver; Matuszewski, Christian (2001), «Layered drawings of digraphs», en Kaufmann, Michael; Wagner, Dorothea, eds., Drawing Graphs: Methods and Models, Lecture Notes in Computer Science 2025, Springer-Verlag, pp. 87-120, doi:10.1007/3-540-44969-8_5.. Bastert and Matuszewski also include a description of the Coffman–Graham algorithm; however, they omit the transitive reduction stage of the algorithm.