H. Schwenk, K. Andres, F. Wudl: ANISOTROPY OF THE LOWER CRITICAL-FIELD AND MEISSNER EFFECT IN (TMTSF)2CLO4 IN THE BASAL-PLANE. 1984Solid State Communications: 49. ISBN 0038-1098 http://dx.doi.org/10.1016/0038-1098(84)90229-1