Wolf, Gerhard Kunsthistorisches Institut in Florenz, MPI, Max Planck Society;
Wolf, G. (2004). Holy place and sacred space: hierotopical considerations concerning the Eastern and Western Christian cultures from late antiquity to the middle ages. In A. M. Lidov (Ed.), Ierotopija: issledovanie sakral'nych prostranstv; materialy meždunarodnogo simpoziuma = Hierotopy: studies in the making of sacred spaces; material from the international symposium (pp. 34-36). Moskva: Radunica.