FIELD-INDUCED MAGNETIC PHASE TRANSITION IN A SINGLET GROUND STATE DIMER SYSTEM S. S. U. Kazmi, K. J. Maxwell and J. R. Owers-Bradley J. Phys. Colloques, 49 C8 (1988) C8-1509-C8-1510 DOI: 10.1051/jphyscol:19888695