Biolik, M., and J. Duma. “Proto-Indo-European Root *h2engh- ‘go Crooked, Go Round, meander’ and Other Phonetically and Semantically Similar Roots in Appellatives and Names of Rivers in the Germanic, Baltic and Slavic Territories”. Prace Językoznawcze, vol. 22, no. 2, July 2020, pp. 5-22, doi:10.31648/pj.5229.