Om r-fonemets historia i svenskan
It is suggested that Proto-Nordic /r/ was velar or uvular and /z/ postdental. It is suggsted that the two pronunciations were preserved in different areas after the phonemic merger: postdental in central Sweden and Norway and velar/uvular in the south of Scandinavia. The idea that the velar /r/ was imported from France int he 17th or 18th century is rejected.