Indo-Germanic
| Author(s) | Title | Reference | |
|---|---|---|---|
| Celia Sisam | An Old English grammar, by Randolph Quirk, C. L. Wrenn | 25/1, p. 52 | |
| G.W.S. Friedrichsen | Suomalaisen Tiedeakatemian Toimituksia: Annales Academiae Scientiarum Fennicae. Series B. Tom. 84 | 24/2, p. 107 |