1. Some controversies in planning and analysing multi-centre trials
2. Gamma-distribution order statistics, maximal multinomial frequency and randomization designs
3. , . Optimal design of multicentre clinical trials with random enrolment. GSK BDS Technical Report 2003-03, 2003 (Available from: http://www.biometrics.com/5DBE1E43769243B380257146004342D6.html).
4. . Design of multicentre clinical trials with random enrolment. In Advances in Statistical Methods for the Health Sciences, , , (eds). Birkhauser: Basel, 2006; 387–400.