Bogdanov, K., Tsonev, D., and Kuzmanov, K., 1997, Mineralogy of gold in the Elshitsa massive sulfide deposit, Sredna Gora zone, Bulgaria: Mineralium Deposita, v. 32, p. 219229. (Also available at http://dx.doi.org/10.1007/s001260050087.)Peytcheva, I., von Quadt, A., Kouzmanov, K., Bogdanov, K., 2003, Elshitsa and Vlaykov Vruh epithermal and porphyry Cu(-Au) deposits of Central Srednogorie, BulgariaSource and timing of magmatism and mineralization, in Eliopoulos, D.G., and others, eds., Mineral exploration and sustainable development, v. 1: Rotterdam, Millpress, p. 371373.
Strashimirov, Strashimir; Petrunov, Rumen; and Kanazirski, Milko, 2002, Porphyry-copper mineralization in the central Srednegorie zone, Bulgaria: Mineralium Deposita, v. 37, p. 587598. (Also available at http://dx.doi.org/10.1007/s00126-002-0275-6.)Strashimirov, S., and Popov, P., eds., 2000, Geology and metallogeny of the Panagyuriste ore region (Srednogorie zone, Bulgaria): Sofia, Publishing House St. Ivan Rilski, Geodynamics and Ore Deposit Evolution of the Alpine-Balkan-Carpathian-Dinaride region (ABCD-GEODE) Workshop, Borovets, Bulgaria, 2000, Excursion Guide (A and B), 50 p.
von Quadt, A., Peytcheva, I., Fanger, L., and Heinrich, C., 2005, The Elatsite porphyry Cu-Au deposit, BulgariaOre depositLat. 42° 45? N, Long. 24° 02? E: Ore Geology Reviews, v. 27, p. 128129. (Also available at http://dx.doi.org/10.1016/j.oregeorev.2005.07.022.)Ciobanu, C.L., Cook, N.J., and Stein, Holly, 2002, Regional setting and geochronology of the Late Cretaceous Banatitic magmatic and metallogenetic belt: Mineralium Deposita, v. 37, p. 541567. (Also available at http://dx.doi.org/10.1007/s00126-002-0272-9.)Nakov, Radoslav; Kerestedjian, Thomas; and Kunov, Angel, 2002, The Silistar Intrusive, eastern Srednogorie Zone, BulgariaStructural data and potential for porphyry copper and epithermal systems: Turkish Journal of Earth Sciences, v. 11, p. 217229. (Also available at http://journals.tubitak.gov.tr/earth/issues/yer-02-11-3/yer-11-3-4-0010-1.pdf.)Singer, D.A., Berger, V.I., and Moring, B.C., 2008, Porphyry copper deposits of the worldDatabase and grade and tonnage models, 2008: U.S. Geological Survey Open-File Report 2008-1155, [45] p. and digital data, accessed December 31, 2013, at http://pubs.usgs.gov/of/2008/1155/.Zimmerman, Aaron; Stein, H.J.; Hannah, J.L.; Koelj, Dejan; Bogdanov, Kamen; and Berza, Tudor, 2008, Tectonic configuration of the Apuseni-Banat-Timok-Srednogorie belt, Balkans-South Carpathians constrained by high-precision Re-Os molybdenite ages: Mineralium Deposita, v. 43, p. 121. (Also available at http://dx.doi.org/10.1007/s00126-007-0149-z.)