Day S, Taheri A. Geodesics on ${\bf SO}(n)$ and a class of spherically symmetric maps as solutions to a nonlinear generalised harmonic map problem. TMNA [Internet]. 2018 May 21 [cited 2024 Apr. 16];51(2):637-62. Available from: https://apcz.umk.pl/TMNA/article/view/TMNA.2018.020