AGGARWAL, M. M., AHAMMED, Z., HŘIVNÁČOVÁ, I., PETRÁČEK, V., RAK, J., ŠUMBERA, M., KUGLER, A. Interferometry of direct photons in central 208Pb+208Pb collisions at 158A GeV. Physical Review Letters. 2004, 93(2), 022301. ISSN 0031-9007. E-ISSN 1079-7114.