Ballardini, Roberto; Balzani, Vincenzo; Credi, Alberto; Brown, Christopher L.; Gillard, Richard E.; Montalti, Marco; Philp, Douglas; Stoddart, J. Fraser; Venturi, Margherita; White, Andrew J. P.; Williams, Brian J.; Williams, David J. Journal of the American Chemical Society, 1997 , vol. 119, # 51 p. 12503 - 12513