TY - JOUR AU - W. Desch AU - W. Schappacher TI - Hypercyclicity of Semigroups is a Very Unstable Property JO - Mathematical modelling of natural phenomena PY - 2008 SP - 148 EP - 160 VL - 3 IS - 7 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1051/mmnp:2008047/ DO - 10.1051/mmnp:2008047 LA - en ID - MMNP_2008_3_7_a9 ER -