Primary references

• Sörensson, M. 1997. Morphological and taxonomical novelties in the world's smallest beetles, and the first Old World record of Nanosellini (Coleoptera: Ptiliidae). Systematic entomology 22(3): 257–283. DOI: 10.1046/j.1365-3113.1997.d01-40.x Reference page.  [See p. 271, and figs. 1-42; description (female, male)]

Additional references

• Andersen, J.; Hanssen, O.; Ødegaard, F. 2003: Baranowskiella ehnstromi Sörensson, 1997 (Coleoptera, Ptiliidae), the smallest known beetle in Europe, recorded in Norway. Norwegian journal of entomology, 50(2): 139–141. Abstract Full issue (PDF) Reference page. 

• Bezděk, J. & Purchart, L. 2015. First record of the smallest European beetle Baranowskiella ehnstromi (Coleoptera: Ptiliidae) from the Czech Republic. Klapalekiana 51: 163–167. Full article (PDF) on ResearchGate Reference page. 

• Coray, A.; Siede, D. 2014: Zur Verbreitung und Ökologie von Baranowskiella ehnstroemi Sörensson, 1997 in Mittel- und Westeuropa (Coleoptera: Ptiliidae). Koleopterologische rundschau, 84: 55–73. [Not seen] Reference page. 

• Sörensson, M. 2000. New Swedish records of feather-wing beetles (Coleoptera, Ptiliidae), and a discussion of two regionally extinct species. Entomologisk tidskrift 121(4): 181–188. Full article (PDF) Reference page. 

• Wachtel, F.; Hendrich, L. 2014: Baranowskiella ehnstromi Sörensson, 1997 – Der kleinste Käfer Europas erstmals in Bayern nachgewiesen (Coleoptera: Ptiliidae). Nachrichtenblatt der bayerischen entomologen 63(3-4): 101-103. [Not seen] Reference page.