Author — Vitaliy Bril (Moscow, Russian Federation)
Author — Raphaël Wittmann (Marseille, France)
Author — Don Marciano (San Salvador, El Salvador)
Author — Felix Huber (Regensburg, Germany)
Author — Roman Khusnutdinov (Kazan, Russian Federation)
Author — Putra Novembria Candra Kusuma (Karanganyar, Indonesia)
Author — Ivan Lisichkin (Russian Federation)
Author — Egor Stremousov (Novokuznetsk, Russian Federation)
Author — Nadira Filatova (Moscow, Russian Federation)
