I was a fan of Mikhail Zinar

 After the unecpected death of Mikhail Zinar, I wrote a memorial article in two parts about him. You can find it on ChessBase:

https://en.chessbase.com/post/study-of-the-month-2021-02 - Part I

https://en.chessbase.com/post/study-of-the-month-2021-03 - Part II

Most information in the articles is from a 2008 article by Sergey N. Tkachenko:

The King of Pawn Endgames (Russian)