%0 Journal Article %A H. R. Reeh %T Problems of the ground state of the infinite Heisenberg antiferromagnet %J Informatics and Automation %D 1975 %P 390-398 %V 136 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1975_136_a28/ %G en %F TRSPY_1975_136_a28