։Concerning the legal basis of the ownership of Chichen and other sites of patrimony, see Breglia (2006), in particular Chapter 3, "Chichen Itza, a Century of Privatization". Regarding ongoing conflicts over the ownership of Chichen Itza, see Castañeda (2005). Regarding purchase, see "Yucatán: paga gobierno 220 mdp por terrenos de Chichén Itzá," La Jornada, 30 March 2010, retrieved 30 March 2010 from jornada.unam.mx
