Antiferromagnetic ordering between unstable 4f shells in CeAl2 F. Steglich, C.D. Bredl, M. Loewenhaupt and K.D. Schotte J. Phys. Colloques, 40 C5 (1979) C5-301-C5-307 DOI: 10.1051/jphyscol:19795106