Colliot-Thélène, Jean-Louis, Dasheng Wei, and Fei Xu. 2020. “Brauer-Manin Obstruction for Markoff Surfaces”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 21 (special, 1-2):1257-1313. https://doi.org/10.2422/2036-2145.201810_002.