Dubei, M.V., and A.V. Zagorodnyuk. “Linearization of Lipschitz-Polynomial and Lipschitz-Analytic Mappings”. Carpathian Mathematical Publications, vol. 3, no. 1, June 2011, pp. 40–48, https://ktipe.pnu.edu.ua/index.php/cmp/article/view/3085.