Alekseev, M.N. 1970. An occurrence of Tiraspolian fauna at the Vilyuy River (Eastern Siberia). Paleogeography, Paleoclimatology, Paleoecology, Elsevier Publ. Company, Amsterdam; 8: 209-214, 1 fig, 1 tab.. { copied = true; setTimeout(() => copied = false, 10000); }).catch(err => { console.error('Failed to copy:', err); }); " type="button" :class="copied ? 'bg-secondary border-secondary' : 'border-primary hover:bg-primary'" class="group lg:min-w-64 flex items-center justify-between gap-5 border border-solid px-5 py-2 cursor-pointer transition-colors"> PDF download available