Non-parametric seasonal unit root tests under periodic non-stationary volatility. - Kemal Çaglar Gögebakan; Burak Alparslan Eroglu (Comput. Stat., 2022)

Bounded unit root processes with non-stationary volatility. - Kemal Çaglar Gögebakan; Burak Alparslan Eroglu (Commun. Stat. Simul. Comput., 2023)