https://nnmclub.to/forum/viewtopic.php?t=683433

2021
https://www.wizcase.com/blog/understanding-the-invisible-internet-project/
2017
https://www.tandfonline.com/doi/full/10.1080/21642583.2017.1331770
    ! need to read
2012
https://habr.com/ru/articles/152771/