Are there good tutorials on preprocessors in Russian?

Question

Sass

Actually, I couldn't find anything at all. There are separate articles, reviews, methods of work. A is interested in normal sequential guidance from A to B

Answer 1

One , two , three , four (obvious :)) + five .
But, in fact, everything is very simple there.

Answer 2

Documentation? In fact, there is nothing special to learn there, the main thing is to understand the principles and some differences between one preprocessor and another.