Efremov N. N. «Polypredicative constructions with a spatial meaning in the Yakut language» // Siberian Journal of Philology 2015. №2 C.27-35
Gorbunova Lyudmila I. «Adjective prefixes denoting the location of the vertical: the locativecomponent in meanings» // 2011. №1 (13) C.32-39