Eleniceras - genre nouveau d'ammonites hautériviens, Bull. Geol. Inst., Ser. Paleontology, 16: 47-52. T. Nikolov, St. Breskovski, (1969), Abrytusites – nouveau genre d’ammonites barrémiennes. Bull. Geol. Inst., ser. Paleontology, 18, 91-96. Стойчо Бресковски (1966), Биостратиграфия на барема южно от Брестак, Варненско [Biostratigaphie du Barrémien au Sud du village de Brestak, dans la région de Varna], Тр. Геолог Бълг., сер. Палеонтология, 8, 71-121. Notes References C. W. Wright with J.H. Callomon and M.K. Howarth (1996), Mollusca 4 Revised, Cretaceous Ammonoidea, vol. 4, in Treatise on Invertebrate Paleontology, Part L (Roger L. Kaesler et el. eds.), Boulder, Colorado: The Geological Society of America & Lawrence, Kansas: University of Kansas Press, xx + 362 p., 216 fig. Jost Wiedmann, Cretaceous Ammonoidea, in M.R. House and J.R. Senior eds (1981), Ammonoidea, Environment, Ecology and Evolutionary Change , London: Academic Press, Systematics Association Special Volume. 18. Natalia Dimitrova (1967), Fosilite na Bulgaria. IV. Dolna Kreda - Glavonogi [Fossils of Bulgaria. IV. Lower Crateceous - Cephalopoda (Nautiloidea & Ammonoidea)], Sofia: Bulgarian Academy of Sciences, 424 p., 93 pl. (In Bulgarian with French summary). Maria B. Aguirre-Urreta, Peter F. Rawson (2003), Lower Cretaceous ammonites from the Neuquén Basin, Argentina: The Hauterivian genus Holcoptychites, Cretaceous Research 24, 589-613. M. Matsukawa, I. Obata & K. Sato (2007), Barremian Ammonite Fauna of the Lower Ishido Formation, eastern part of Sanchu Cretaceous, Japan, Bull. of Tokyo Gakugei Univ. Nat. Sci., 59, 77-87. Hosni Hamama (2010), Barremian and Aptian Mollusca of Gabal Mistan and Gabal Um Mitmani, Al-Malghara Area, Northern Sinai, Egypt, Journal of American Science, 6(12), at 1704. Zdeněk Vašíček (2010), Early Cretaceous ammonites from the Butkov Quarry (Manin Unit, Central Western Carpathians, Slovakia), Acta Geologica Polonica, Vol. 60, No.3, 393-415. Peter F. Rawson, M. Beatriz Aguirre-Urreta (2012), Lower Cretaceous ammonites from the Neuquén Basin, Argentina: The Hauterivian genus Spidiscus, Cretaceous Research 33, 97-105. External links Bulgarian geologists 1934 births 2004 deaths Bulgarian paleontologists People from Stara Zagora Province Sofia University alumni 20th-century Bulgarian zoologists 20th-century geologists