Nuclear magnetic ordering in Ca(OH)2. III. Experimental determination of the critical temperature C.M.B. van der Zon, G.D.F. van Velzen et W. Th. WenckebachJ. Phys. France, 51 13 (1990) 1479-1488DOI: https://doi.org/10.1051/jphys:0199000510130147900