ШИФРИН, Б. Friction on air wheels: a special towed air wheel. Problems of Tribology, [S. l.], v. 73, n. 3, p. 54–58, 2015. Disponível em: https://tribology.khnu.km.ua/index.php/ProbTrib/article/view/392. Acesso em: 9 apr. 2025.