Celtic knifes-swords ring hilt end

[Lugorix]

Are you speaking of those single-edged iron knives from the continent? Sounds like you're asking for a verrry specific report that may not have been written, or at least might be in German.

Are you looking for the range of styles, or how they are constructed, or distribution, or ???

I have a report on ring-hilted bronze knives, but that is pre-Celtic and probably not what you're looking for.