Big thanks for You all
I will try to find a compromise between theory and practice. I mean I want to do a proper restoration with good theoretical base about the object. I'm not an art and weaponry historian, but for my objects I must know their origin and general history. Being here and reading fascinating informations and a lot of posts full of passion, cause thirst of knowledge in me
As Mr Jim McDougall noticed, it's not an easy field to research, because of its diversity. And with not enough bibliography in my country (for ordinary person like me to read in 5 languages may be hard, as far as i will find those publications i want

). Nevertheless it's worth to try
I was searching some resemblence in Turetskoe Oruzhie and on the blade of one yataghan. What do you think, may I be right?
Monika