Kalybay Aigerim and Oinarov Ryskul and Sultanaev Yaudat: Oscillation and spectral properties of some classes of higher order differential operators and weighted nth order differential inequalities. (2021)
Kalybay Aigerim and Karatayeva Danagul and Oinarov Ryskul and Temirkhanova Ainur: Oscillation of a second order half-linear difference equation and the discrete Hardy inequality. (2017)