Hamp, E.P. 1974. Lith. nasraĩ, Slav. nozd()ri, OIr. srón, Gk. ῥῑ́ς. Baltistica. 10, 1 (rugs. 1974), 69–72. DOI:https://doi.org/10.15388/baltistica.10.1.1847.