@article{JGAA_2022_26_1_a9,
     author = {Jonathan Klawitter and Tamara Mchedlidze},
     title = {Upward planar drawings with two slopes},
     journal = {Journal of Graph Algorithms and Applications},
     pages = {171--198},
     publisher = {mathdoc},
     volume = {26},
     number = {1},
     year = {2022},
     doi = {10.7155/jgaa.00587},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.7155/jgaa.00587/}
}