Colliot-Thélène, Jean-Louis, Dasheng Wei, and Fei Xu. “Brauer-Manin Obstruction for Markoff Surfaces”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 21, no. special, 1-2 (December 24, 2020): 1257-1313. Accessed May 26, 2025. http://20.103.181.36/index.php/annaliscienze/article/view/936.