Стасевский, Станислав, Юрий Угрюмов, and Валерий Балакин. 2020. “PROBLEMS OF ROLLING THE PILGRIME HEAD AND WAYS OF THEIR SOLUTION. Message 2”. SWorldJournal 1 (06-01):12-29. https://doi.org/10.30888/2663-5712.2020-06-01-006.