The effects of thermal annealing on the relaxation of rubbing-induced birefringence in polystyrene K. P. Shiu, Zongyi Qin and Z. Yang Eur. Phys. J. E, 17 2 (2005) 139-147 Published online: 10 May 2005 DOI: 10.1140/epje/i2004-10136-7