Taxonomy of Neotropical Pierinae; butterflies of the Balkan Peninsula.
Honours, research grants
2004 — Smithsonian Institution Short-Term Visitor Award for an appointment at the National Museum of Natural History, Washington DC; subject: Revision of the genus Leodonta and Types of Neotropical Pierinae [10 January — 8 February 2005]
2004 — Royal Society Grant for an appointment at The Natural History Museum, London; subject: Types of Neotropical Pierinae [11 October — 10 December 2004]
2003 — EU Grant (COLPARSYST) (IHP Programme) for 4 week access to the collections and library of the Muséum National d’Histoire Naturelle, Paris; subject: Type specimens of Balkan butterflies and Types of Neotropical Pieridae [6—31 October 2003]
2001 — EU Grant (SYS-RESOURCE) (IHP Programme) for 5 week access to the Entomology Department and Libraries of The Natural History Museum, London; subject: Type specimens of Balkan butterflies (Lepidoptera: Hesperioidea & Papilionoidea) [12 November — 14 December 2001]
Karelia Coast, north of the Arctic Circle, Russia (1991); Albania (1994, 1995); Turkey, from Anatolia and the Taurus system to the Pontic Mountains (1996).
Field studies on distribution and abundance of invertebrates, EEA
Louy, D., Habel, J. C., Abadjiev, S. & Schmitt, T., 2013. Genetic legacy from past panmixia: high genetic variability and low differentiation in disjunct populations of the Eastern Large Heath butterfly. — Biological Journal of the Linnean Society 110: 281—290. [PDF]
Langourov, M., Simov, N. & Abadjiev, S., 2013. Chilades trochylus (Freyer, ) (Lep.: Lycaenidae), new for the North Aegean islands. — Entomologist’s Rec. J. Var. 125: 137—143. [PDF]
— [complete list