Russian silver wire coins

Hi guys, do you know some bibliography about the Russian wire coins? There is a big affluence of them in the Baltic countries but I can't identify them or even I can't know if they are true. Can you recommend me something for read in English? Thank you.

Hello and Welcome to Numista
I think this links Solves Everything :
1. https://www.metaldetectingworld.com/hammered_wire_silver_coins.shtml
2. https://www.kyiv2014.com/wire.html
3. https://en.wikipedia.org/wiki/Denga

Thank you, Amraan!

For the Russian coins of Rus' Principalities - https://www.academia.edu/39159505/Huletski_Petrunin_Fishman_Russian_coins_1353_1533_
For the online catalog of later coins - http://silver-copeck.ru/ - you can use google translator

Also Numista catalog now seems to be quite nice for the common wire coins from Ivan IV and later