CRITICAL EXPONENT β OF THE TWO-DIMENSIONAL ANTIFERROMAGNET (CH3NH3)2FeCl4 H. KELLER, W. KÜNDIG et H. ARENDJ. Phys. Colloques, 37 C6 (1976) C6-629-C6-632DOI: https://doi.org/10.1051/jphyscol:19766131
