ONGAROVA, Yerkinay, et al. “KAZAKHSTAN DIPLOMACY IN DEFINING THE LEGAL STATUS OF THE CASPIAN SEA: 1991-2017”. CENTRAL ASIA AND THE CAUCASUS, vol. 19, no. 3, June 2018, pp. 49-62, https://www.ca-c.org/CAC/index.php/cac/article/view/1455.