Furthermore, here is a brief excerpt from a recent article which also indicates that isochrons often have severe problems.
Waxaan kaloo ku faraxsanahay sida qoraal aan dhawan u soo gudbiyay saxaafadda qaarkeed uga marag ka ceen dadkii ka hadlay in dhibaatada Gaalkacayo ay inteeda badan leeyihiin reer Gaalkacayo.