1. The Status of Voiced Fricatives in Old English;Anderson,1988
2. Zur hochdeutschen Lautlehre (hd. f. = wgerm. b);Bahder;Indogermanische Forschungen,1903
3. Voice Opposition in the System of Old English Spirants;Bammesberger,1988
4. The Southern English Development of Germanic Initial [f s p]
5. Predicting Indo-European Syllabification through Phonetic Analysis;Byrd,2012