D. Zhang, K. Andres, C. Probst, W. Biberacher, ND. Kushch, H. Kobayashi: Indication for an antiferromagnetically ordered state in the organic conductor kappa-(BETS)(2)FeCl4. 2000Solid State Communications: 115. ISBN 0038-1098 http://dx.doi.org/10.1016/S0038-1098(00)00205-2