Excitonic photoluminescence spectra of C60 single crystals grown by different techniquesV. Capozzi, M. Santoro, G. Perna, G. Celentano, A. Minafra and G. CasamassimaEur. Phys. J. AP, 14 1 (2001) 3-11DOI: https://doi.org/10.1051/epjap:2001135