Measuring beta in B<sub>s</sub>(t) --> phi K<sub>s</sub> UdeM Preprint ID: UdeM-GPP-TH-01-84 Authors: Alakabha Datta , C.S. Kim , David London arXiv: http://xxx.lanl.gov/abs/hep-ph/0103321 Journal Reference: Phys. Lett. B507 (2001) 153-161