THE CHROMOSPHERE AND CORONA OF PROCYON (ALPHA-CMI, F5 IV-V)
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 196:3 (1981) 757-779
X-RAY-EMISSION FROM M87 - A PRESSURE CONFINED COOLING ATMOSPHERE SURROUNDING A LOW MASS GALAXY
ASTROPHYSICAL JOURNAL 247:2 (1981) 464-472
X-RAY-LINE WIDTHS AND CORONAL HEATING
ASTROPHYSICAL JOURNAL 244:3 (1981) L137-&