TY - CPAPER AU - M. Rast CY - Aarhus, Denmark DO - 10.1007/978-94-011-5167-2_13 N1 - JILA Pub. 5825 PB - Kluwer Academic Publishers PP - Aarhus, Denmark PY - 1997 TI - Photospheric Downflows: How deep, how coherent, how important? ER -