For the equation L₀x(t) + L₁x⁽¹⁾(t) + ... + Lnx⁽ⁿ⁾(t) = 0, where Lk, k = 0, 1, ... , n, are operators acting in a Banach space, we formulate conditions under which a solution x(t) that satisfies some nonlocal homogeneous ...