Here is my article I uploaded on RG on 21st April 2018:
Preprint Surfaces: from generalised Weierstrass representation to Car...
And here is a book chapter submitted on 13th July 2018:
Chapter The Generalized Weierstrass System in Three-Dimensional Eucl...
There is a strange similarity, if compared form section §1 of my article, and from section 2. of the chapter, especially section §3 and 4., yet no proper citation.
What do you think?