To ensure that the viewer guessed in the name of Ilfipetrov that Ilya Ilf and Yevgeny Petrov were separate, the authors collected an impressive evidence base: live testimonies were obtained in Moscow, Odessa, Yaroslavl, Paris, New York; in the exact repetition of the route of "One-storied America", in miraculously preserved family archives.

• Sergei Makovetsky
• Igor Zolotovitsky
• Leonid Kanevsky
• Polina Agureyeva
• Ekaterina Fedulova
• Mikhail Efremov
• Dmitriy Khoronko
• David Gamburg