Hartz, Michael, and John McCarthy. 2026. “From Clouatre-Ostermann-Ransford to Okubo-Ando”. Visnyk of V. N. Karazin Kharkiv National University. Ser. Mathematics, Applied Mathematics and Mechanics 104 (August), 5-13. https://doi.org/10.26565/2221-5646-2026-104-01.