Phase clustering in globally coupled photochemical oscillators A. F. Taylor, P. Kapetanopoulos, B. J. Whitaker, R. Toth, L. Bull and M. R. Tinsley Eur. Phys. J. Special Topics, 165 (2008) 137-149 Published online: 11 December 2008 DOI: 10.1140/epjst/e2008-00857-9