Kairies, H.-H. (2001) “On a Banach space automorphism and its connections to functional equations and continuous nowhere differentiable functions”, Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, 1, pp. 39–48. Available at: https://studmath.uken.krakow.pl/article/view/13515 (Accessed: 30 October 2026).