Greiner G. Adjoints of semigroups acting on vector-valued function spaces / G.Greiner,J.M.van Neerven, 1990. - 21 p. - Текст : непосредственный.
Greiner G. singular perturbation theorem for evolution equations and time-scale arguments for structured population models / G.Greiner,J.A.P.Heesterbeek,J.A.J.Metz, 1992. - 16 p. - Текст : непосредственный.