Hamlet Petrosyan, Symbols of Armenian Identity. The Khachkar or Cross-Stone.
Hamlet Petrosyan, Medieval Armenian Sculpture and the Khachkar (Stone Cross)
Hamlet Petrosyan, Cross stone culture of the city of Ani (in Armenian, English summary)
Hamlet Petrosyan, The Onomastic System of Khachkars and Khachkars Named as Saint Sargis – Saint Sargis, Yerevan, 2002. p. 60-79 (in Armenian)
Hamlet L. Petrosyan, Iconography of Julgha’s cross-stones (in Armenian)
Hamlet L. Petrosyan, Khachkars (Armenian cross-stones, in Russian)
Simon Maghakyan. Sacred Stones Silenced in Azerbaijan
Judith Crispin. Anzac Day, The Amenian Genocide and the destruction of cultural heritage in the Caucasus