ZERO TEMPERATURE PROPERTIES OF THE S = 1/2 HEISENBERG ANTIFERROMAGNET AND XY FERROMAGNET IN THREE DIMENSIONS J. Oitmaa et D. D. BettsJ. Phys. Colloques, 39 C6 (1978) C6-817-C6-818DOI: https://doi.org/10.1051/jphyscol:19786364
