License

Content of this website (by which I mean notes, including images and drawings within notes), are shared on CC BY-SA 4.0 International unless noted otherwise.

It means that you can copy, adapt and share / republish this content, as long as your creation based on my content is shared alike. Commercial uses of this work are allowed.

If you would like to republish article authored by me, I would be pleased. You can drop me an e-mail about such fact. It is always good to know that someone finds my creation useful.