De Luca, Felice, Emilio Di Giacomo, Seok-Hee Hong, Stephen Kobourov, William Lenhart, Giuseppe Liotta, Henk Meijer, Alessandra Tappini, and Stephen Wismath. “Packing Trees into 1-Planar Graphs”. Journal of Graph Algorithms and Applications 25, no. 2 (November 1, 2021): 605–624. Accessed June 30, 2024. https://jgaa.info/index.php/jgaa/article/view/paper574.