“Three-operator Problems in Banach Spaces: doi:10.17398/2605-5686.33.2.149” (2018) Extracta Mathematicae, 33(2), p. 149–165. Available at: https://revista-em.unex.es/index.php/EM/article/view/2605-5686.33.2.149 (Accessed: 22 December 2024).