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Katrina Biele, Yuan Feng, David Heras, Ahmed Tadde. Associating Finite Groups with Dessins d’Enfants(PDF). Purdue Research in Mathematics Experience (PRiME), Department of Mathematics, Purdue University. 2013 [2021-10-23]. (原始内容存档(PDF)于2021-10-23).
Katrina Biele, Yuan Feng, David Heras, Ahmed Tadde. Associating Finite Groups with Dessins d’Enfants(PDF). Purdue Research in Mathematics Experience (PRiME), Department of Mathematics, Purdue University. 2013 [2021-10-23]. (原始内容存档(PDF)于2021-10-23).