Dr. Felix Karbstein exercise:
https://indico.jinr.ru/event/797/material/slides/1.jpg
Dr. Markus Schulze exercise:
https://indico.jinr.ru/event/797/material/slides/4.jpeg
Dr. Arseny Mironov exercises from presentation:
https://indico.jinr.ru/event/797/material/slides/19.pdf