Panja, D., & van Zon, R. (2002). Lyapunov Exponent Pairing for a Thermostatted Hard-Sphere Gas under Shear in the Thermodynamic Limit. Physical Review E, 65, 06102.
Panja, D., & van Zon, R. (2002). Pairing of Lyapunov Exponents for a Hard-Sphere Gas under Shear in the Thermodynamic Limit. Physical Review E, 66, 021101.
Panja, D., & van Saarloos, W. (2002). Fronts with a Growth Cutoff but Speed Higher than linear spreading speed. Physical Review E, 66, 015206.