Xie XC, He S, Sarma DS. Finite-size studies of semion systems. Physical Review Letters. 1990;(5):649-652.

Sarma DS, He S, Xie XC. Localization, mobility edges, and metal-insulator transition in a class of one-dimensional slowly varying deterministic potentials. Physical Review B. 1990;(9):5544-5565.

He S, Zhang FC, Xie XC, Sarma DS. Destruction of fractional quantum Hall effect in thick systems. Physical Review B. 1990;(17):11376-11379.

Xie XC, Li QP, Sarma DS. Density of states and thermodynamic properties of a two-dimensional electron gas in a strong external magnetic field. Physical Review B. 1990;(11):7132-7147.